重点讲解：
1. close down
（工厂、商店、学校等）永久性关闭；（使）停业；（使）倒闭；
eg. When they did leave, it caused the local supermarket to close down.
当他们真走了之后，当地的超市也随即关门了Lv]ya-_Y&0+。
eg. They wanted to close down the railway line, but hundreds of people objected.
他们想停止使用那条铁路线，但遭到数百人的反对]ZNW3TO*qA。
2. pick up
拿起；提起；拾起；捡起；
eg. Send an email or pick up the phone and call those people you wish to see over the holidays.
给那些你想在节日里见到的人发邮件或拿起电话打给他们7Ynn+IM30,-I0)A*VK!X。
eg. They depend on the goodwill of visitors to pick up rubbish.
他们相信游客会自觉捡起垃圾HqeJ1@wrivy|TV[。
3. at first
最初；起初；开始时；
eg. The finding was at first puzzling.
该发现起初让人感到困惑o_qm&(vVpjx)。
eg. At first progress was slow.
开始时进展比较缓慢arIBF8BnE#。
4. cut up
切碎；切开；
eg. The woman cut up the watermelon and shared it out among the four boys.
那妇人把西瓜切开，分给四个孩子)hCI+t~hl7E9=)%。
eg. Scraps of material were saved, cut up and pieced together for quilts.
边角碎料都保留下来，剪好后拼在一起做成被子0h0asAS#|~kj。
5. at least
（表示相对于不利条件或糟糕情形）起码，不管怎样；
eg. At least you made that speech.
起码你还发表了那番演说5ZaliTeLzw&G。
eg. At least this second meeting had helped to thaw the atmosphere.
这第二次会议至少起到了缓和气氛的作用=B~~V),^1qmS0izuCUy。