a middle course;a mean course;golden mean;middle of the road;juste-milieu ;
例句:
He always believed in striking a happy medium.
他始终相信中庸之道.
A middle course is the safest.
中庸之道最保险.
You'd better find the golden mean between the two extremes.
你最好找到两个极端之间的中庸之道.