1. We tabbed him as a walking encyclopaedia.

我们管他叫活字典。

2. He knew his subject from A to Z.

他对自己研究的学科无所不知。

3. There's nothing he doesn't know about photography.

有关摄影就没有他不知道的。

4. He's a computer expert.

他是个电脑专家。

5. We need a strong farm hand.

我们需要一个强壮的田间能手。

6. He is a green thumb.

他是个园艺高手。

7. She's an old hand at dealing with the press.

应对媒体，她是个老手。