重点讲解:
1. on record 有记录的;有记载的;
例句:It was the coldest winter on record.
那是有史以来最冷的冬天 。
2. back up 支持,证实(某种说法);
例句:Radio signals received from the galaxy's centre back up the black hole theory.
从该星系中心收到的无线电信号证实了黑洞理论 。
3. cut down 砍倒(树木);
例句:A vandal with a chainsaw cut down a tree.
一个故意破坏公物的人用链锯伐倒了一棵树 。
4. make sense (行为方式)有道理,合乎情理;
例句:It doesn't make sense to argue with him.
和他争论没有任何意义 。
n. 发行物,期刊号,争论点
vi. & vt