53、tend to
倾向于，趋向于。
The paper says people tend to feel unwell if they sleep less than six hours a day.
报纸上说人如果每天睡眠少于6个小时将感到不舒服。
54、through
本意是穿越，穿过。在以下几个搭配中分别又有了不同的含义。
（1）浏览。 read (straight) through
I’d better read it through again. 我最好还是再通读一次。
I didn’t read straight through the way you read a novel.
我不像你读小说那样从头到尾地浏览一遍。
（2）结束、完成（工作）be (go) through
I had a hard time getting through this test. 完成测验对我来说很难。
That only leaves us 15 minutes to go through the customs and check our baggage.
我们只有15分钟的时间来接受海关检查和行李检查。
After two sleepless nights, I’m finally through with it.
经过两个不眠之夜，我终于完成了。
（3）接通。get sb through
Would you get me through to Dr. Lemon please? 能帮我接通Lemon医生吗？
（4）睡过了。sleep through
How could you sleep through it? 你怎么能睡过头了呢？
（5）播放出来。come through
The power indicator was on, and it was running, but somehow the sound didn’t come through.
电源指示灯是亮的，并且正常工作，但是为什么声音就是出不来呢？
