管 | guǎn | to take care (of) / to control / to manage / to be in charge of / to look after / to run / to care about / tube / pipe / woodwind / classifier for tube-shaped objects / particle similar to 把[ba3] in 管...叫 / constructions / writing brush / (coll.) to / towards | |
衍化 | yǎn huà | to evolve (of ideas, designs, constructions etc) / to develop and change |