重点讲解：
1. run out of
用完；
eg. I had intended to make a cake, but I ran out of time.
我原想做个蛋糕，但没有时间。
eg. We've run out of sugar, so I must buy some more.
我们的糖吃完了，我得再买一些。
2. give away
赠送；
eg. We are giving away all our surplus apples.
我们准备把多余的苹果全部送人。
eg. We give away 5, 000 plastic hag at the exhibition.
在展览会上，我们赠送了五千只塑料袋。
3. on top of
另外； 除此之外；
eg. On top of that, I've got one extra bit of good news I think you might want to hear.
除此之外，我还有一个你想要听到的好消息。
eg. On top of that, Harp and I both learned how to run a camera and do lights back in college.
另外，我和哈普都在大学学过怎么操作摄像机和做灯光。
