If you say that someone's behaviour shows moderation, you approve of them because they act in a way that you think is reasonable and not extreme.
The United Nations Secretary General called on all parties to show moderation.
联合国秘书长呼吁各方要克制。
in moderation
If you say that someone does something such as eat, drink, or smoke in moderation, you mean that they do not eat, drink, or smoke too much or more than is reasonable.