适当 + 的 + Noun
The adjective 适当 (shìdàng) means 'appropriate,' 'suitable,' or 'proper,' describing something that fits the circumstances or meets expectations. It is commonly used in formal contexts to evaluate whether an action or measure is fitting. It can be negated with 不, as in 不适当 (inappropriate).
请在适当的时候通知我。
Qǐng zài shìdàng de shíhòu tōngzhī wǒ.
Please notify me at an appropriate time.
老师对学生的批评要适当。
Lǎoshī duì xuéshēng de pīpíng yào shìdàng.
Teachers should give students appropriate criticism.
适当的运动有助于身体健康。
shìdàng de yùndòng yǒu zhù yú shēntǐ jiànkāng.
Proper exercise helps maintain good health.