左右【zuǒ yòu】
1. about; around; or so 2. master; control; influence 3. the left and right sides
[助]1、表示概数 [动]2、支配,操纵 [名]3、左和右两个方面

他们九点半左右抵达宾馆。
They reached the guesthouse about half past nine.

这种局面你左右得了吗?
Is it within your ability to control the situation?

烈士的墓前,左右两侧摆满了鲜花。
Flowers are placed on the two sides of the grave of the martyr.
作【zuō, zuò】
(zuò) 1. engage; go in for 2. hold 3. do
(zuò) [动]1、从事,做工 2、举行,进行 3、干出,做出

从今天开始,我们实行新的作息时间表。
We work according to the new timetable from today.

陆军将在沙漠里作大规模的军事演习。
The army will carry out large scale military maneuvers in the desert.

这笔生意之所以没谈成,是因为他从中作梗。
It is he who made the business impossible.
作案【zuò àn】
commit a crime or an offence
[动]进行犯罪活动

侦探根据所掌握的线索推断出作案的人。
Detectives deduce the person who has committed the crime from the clue.