1 system

2 to control

3 to regulate

4 variant: 制 zhì

1 system (e.g. political, adminstrative etc)

2 institution

3 classifier: 个 gè

1 to brush one's teeth

1 system for identifying users (on a rail network, the Internet etc)

1 opportunely

2 coincidentally

3 as it happens

4 skillful

5 timely

1 to use foreigners to subdue foreigners (idiom); let the barbarians fight it out among themselves (traditional policy of successive dynasties)

2 Use Western science and technology to counter imperialist encroachment. (late Qing modernizing slogan)

1 an eye for an eye, a tooth for a tooth (idiom)

2 fig. to use the enemy's methods against him

3 to give sb a taste of his own medicine

1 clever and eloquent (idiom); fluent

2 having the gift of the gab

1 to gain the initiative by striking first (idiom); to preempt

2 to anticipate

3 preemptive

1 gnashing one's teeth (idiom); displaying extreme anger

2 fuming with rage between gritted teeth