1.artificial a.人造的；虚伪的；武断的

This orange drink contains no artificial flavourings.
这种橙汁饮品不含人工调味料。

2.scratch n.抓痕；乱写；抓的声音

He pretended to scratch his ear.
他假装搔耳朵。

3.intensive a.密集的；彻底的；精细的

We concentrated intensive fire on the enemy.
我们集中密集的火力向敌人攻击。

4.population n.人口

What is the population of this country?
这个国家的人口是多少？

5.extract v.摘录；提取；拔出；榨出；选取

She extracted a small notebook from her handbag.
她从手提包里取出了一个小笔记本。