重点讲解：
1. catch up on
补做；赶做；
eg. I was catching up on a bit of reading.
当时我在忙着读些东西。
eg. You ought to lie in tomorrow and catch up on your sleep.
明天你该晚些起床，多睡会儿。
2. give away
丧失，失去，错失；
eg. We gave away a silly goal.
我们愚蠢地白送了对方一分。
eg. He wants to give away all his modern possessions and return to nature.
他要舍弃一切时髦的东西而归真返璞。
3. give or take
相差不到…；出入至多…；
eg. They grow to a height of 12 ins — give or take a couple of inches.
它们会长到12英寸高——出入至多几英寸。
eg. It will take an hour, give or take a few minutes either way.
那要花一个小时，上下差不了几分钟。
