Definition
An action that either helps or harms someone.
帮助／伤害他人的行为
He fixed my bike, which was a good turn for me.
他修理了我的自行车，这对我来说是一个善意的行为。
She refused to testify for me, which was a bad turn for me.
她拒绝为我作证，这对我来说是一个恶意的行为。
I helped her with childcare to repay her good turn from last time.
我帮她照顾孩子，以报答她上次的善意行为。