texture / grain (of wood) / inner essence / intrinsic order / reason / logic / truth / science / natural science (esp. physics) / to manage / to pay attention to / to run (affairs) / to handle / to put in order / to tidy up
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