Have you ever heard someone use the phrase "once in a blue moon"? People use this expression to describe something that they do not do very often. For example, someone might say that he tries to avoid eating sweets because they are unhealthy, but will eat chocolate "once in a blue moon". Or someone who does not usually like to go to the beach might say "I visit the shore（海滨）once in a blue moon." While many people use this phrase, not everyone knows the meaning behind it.
The first thing to know is that the moon itself is never really blue. This is just an expression. In fact, the phrase "blue moon" has something to do with the shape of the moon, not the color.
As the moon travels around the earth, it appears to change shape. We associate (联系) certain names with certain shapes of the moon. For example, when we can see a small part of the moon, it is called a crescent moon (新月). A crescent is a shape that looks like the tip of a fingernail（指甲）. When we cannot see the moon at all, it is called a new moon. When we can see the whole moon, it is called a full moon. Usually, there is only one full moon every month. Sometimes, however, there will be two full moons in one month. When this happens, the second full moon is called a "blue moon".
Over the next 20 years, there will only be 15 blue moons. As you can see, a blue moon is a very rare event（稀罕事件）. This fact has led people to use the expression "once in a blue moon" to describe other very rare events in their lives.
BeiJing—Heavy haze still. BEIJING—Heavy haze (雾霾) still covered north and east China on Saturday, with highways closed and flights delayed or canceled.
The smoggy weather affected the country's land from north to south on Saturday, including Beijing, Hebei, Shandong, Jiangsu, Shanghai, Zhejiang, Hunan, Guangxi and Guangdong, with visibility（能见度） less than 50 meters in some areas.
Cities like Shanghai and Nanjing have been enveloped in the grey sky for the past several days. Many walkers in the street had to wear masks. In the Lukou airport in Nanjing, Jiangsu Province, more than 60 inbound（抵达的） and outbound（出发的） flights were canceled on Saturday because of the haze, which also forced primary and middle schools and kindergartens to stop classes on Thursday and Friday in Nanjing.
The Chinese government now plans to clean up the air by cutting coal use, closing some factories and promoting cleaner production.
"We must face up to the realities," said Yan Naiqiang, a professor of environmental science at Shanghai Jiao Tong University. "The treatment（治理） of smog will be a long battle（战斗）."
A：Well，Mr. Jones，we interviewed(面试)three people．Who do you think would be(good) person for the job?
B：I have to say, I thought Mrs. Shaw was much (clever) than the other two，but she wasn't as (nice) as the other two．
A：That's true, and we need someone who can work with people．However．I thought Miss Brown would be (popular) than Mrs. Shaw and Mrs. Green with our clients (顾客).
B：Yeah．you're right．
A：Thank you for your help．Choosing the proper person is (difficult)part of my job．
It's always (easy)when I get someone else's opinion．
B：I'm glad I could help．
name，new, danger, get，shop，hurt，when，message，you，share |
If you have a mobile phone，the Internet could always be with you．And that is often a good thing．You can use the Internet for ，learning and talking with your Mends．But the Internet can also be a place. The good news is that it really isn't too hard to protect (保护) ．Following these tips will let you enjoy the Internet and keep you safe(安全的)．
Take control of your personal information．First．don't too much online．For example，don't put your phone number or real on the Internet．Second，make sure you know who is your personal information．Don't let everyone see everything you put on the Internet．
Be careful of strangers(陌生人)．It can be fun to meet interesting and people on the Internet，but be careful．Some children have found themselves in a dangerous situation they agreed to meet online friends in real life．
Use your time online to make the Internet a better place. Don't say things that will other people．Don't send rude(粗鲁的) ．And delete people who are often rude．
C
In this week's Students Around the World ,Kim talks with Lisa Conroy, a college student from the USA，about her expenses(花费)．
(K=Kim；L=Lisa)
K：Thanks for talking with me today, Lisa．
L：Well．I'm twenty—one，and I'm studying at a university in Chicago.
K：
L：My expenses for every term are almost$15，000．At the start of each term parents pay the $10,000 tuition(学费)．I also get$2，000 from my college．I have to earn(挣)$3，000 myself．
K：How do you do that?
L：I have a part—time job at a hotel．I work about twenty hours a week，and cam$300．
K：
L：It helps to pay for my rent(房租)and meals at college．It also pays for things like my phone，books，and clothes．
K：
L：That's true! My mother advised me to spend my money carefully so I don't have to borrow．I hardly ever go to the movies．My roommates and I usually watch movies online，so it's cheaper．
K：
L：I don't go to restaurants．I cook with my roommates so it's cheaper to eat．I try to walk or ride my bicycle to college. Oh，and I buy a lot of my clothes at second-hand stores．You can find some very cheap，nice clothes in those stores．
A．How else do you save(节省)money? B．How do you spend that money? C．Could you tell us a little about yourself? D．Do you often ask for money from your parents? E．How are you paying for your college education? F．You don't use much money for fun，do you? |
