tonic|tonics

这些按摩可以起到强健肌肉的效果。

These massages have a ___tonic effect on your muscles.

新鲜空气和运动是最好的天然提神剂。

Fresh air and exercise are the best natural ___tonics.

早晨的新鲜空气对我的精神是一剂良药。

The fresh morning air was a great ___tonic for my spirits.