协同作用

synergy / cooperative interaction

to cooperate / to harmonize / to help / to assist / to join

to cooperate / in coordination with / coordinated / collaborate / collaboration / collaborative

like / same / similar / together / alike / with

see 衚衕|胡同[hu2 tong4]

worker / workshop / (slang) troublesome / high-maintenance (person)

to do; to engage in / to write; to compose / to pretend; to feign / to regard as; to consider to be / to be; to act the part of / to feel (itchy, nauseous etc) / writings; works

to act on / to affect / action / function / activity / impact / result / effect / purpose / intent / (suffix) -ation, -tion etc, as in 抑制作用[yi4 zhi4 zuo4 yong4], inhibition

to use / to employ / to have to / to eat or drink / expense or outlay / usefulness / hence / therefore