适时

会议开始的时候，他适时地提出了问题。

huìyì kāishǐ de shíhou, tā shìshí de qǐdá le wèntí.

At the beginning of the meeting, he raised a timely question.

她在孩子睡觉时适时地离开了房间。

tā zài háizǐ shuìjiào shí shìshí de líkāi le fángjiān.

She left the room when the child was sleeping.