1. of course

一定，当然

eg. "Can I just say something about the game on Saturday?"—"Yes, of course you can."

“我可以就说说关于星期六的那场比赛吗？”—“可以，当然可以。”

eg. "I guess you're right.""Of course I'm right!"

“我想你是对的。”“当然我是对的。”

2. ice age

冰期；冰河时代

eg. But also I think those Ice Age conditions were critical as well.

但我认为当时冰河时代的客观条件也是极为关键的。

eg. So it was a regional redistribution and not a global phenomenon like an ice age.

所以这是一种区域性的气候再分配，而非冰河时代那样的全球现象。

3. in order to

为了

eg. In order to compass our object we must work hard.

为了达到我们的目标，我们必须努力工作。

eg. He polished off his work in order to see his girlfriend.

为了去见女朋友，他匆忙地做完手头的工作。