The man is a space scientist.

这个人是太空科学家。

to make a public speech

发表演说

to learn about words in dictionary

用词典学习单词

great painter

伟大的画家

sightseeing

观光

I believe my son is a genius.

我的（未来的）儿子想必是个天才。

The author of these books is a great writer.

这些书的作者是位伟大的作家。

to speed-read

速读

to live in the library

过着研究的生活

to teach how to drive a car

教人驾驶汽车

He is studying the ecology of ameba.

他在研究阿米巴（一种线性变形虫）的生态。

The man is a piano accompanist.

这个人是钢琴伴奏者。

She is singing in practice.

她在练习唱歌。

violinist

小提琴演奏家

to conduct an orchestra¹

指挥交响乐

scholar

学者

He has majored in biology.

他专供生物学。

He studied quite a lot.

他非常用功。

Teacher. He is teaching.

老师。正在教书。

Pupil. He is studying.

学生。正在学习。

to type a term paper

用打字机打期末报告

The target shooting requires the power of concentration.

射击需要集中精神。