moderation

US /ˌmɑː.dəˈreɪ.ʃən/
UK /ˌmɑː.dəˈreɪ.ʃən/
1.

절도

the avoidance of excess or extremes, especially in one's behavior or political opinions.

:
he urged them to show moderation
2.

절도

the retardation of neutrons by a moderator.