重点讲解：
1. compare with 相比；
例句：They often compare the present with the past.
他们经常将现在与过去做比较。
2. turn up （常指出其不意地或经长久等待后）出现，到来，露面；
例句：Something must be wrong that she hasn't turned up.
她还没来，准出了什么问题。
3. on time 准时；按时；
例句：Their planes usually arrive on time.
他们的飞机通常都会准时抵达。
4. chill out （疲劳、紧张过后）放松，松弛；
例句：I'm sick of studying at weekends. I just want to chill out.
我就讨厌在周末学习，我想要的是放松一下。