ㄌㄧㄤˋㄌㄧˋˊㄒㄧㄥˊliànglì’érxíng

  1. 估量自身能力做事量力而為」。 任何事情量力而行不要根本」。

to assess one's capabilities and act accordingly (idiom)​; to act within one's competence, One does what one can.