hobbyhorse
n. 木马；竹马；摇动木马
例句
Honesty is a favourite hobbyhorse for Courau.
诚实是库罗最爱用的口头禅。
《柯林斯英汉双解大词典》
Every man has his hobbyhorse.
人贵有自知之明。
Now he's started on his hobbyhorse.
现在他又开始老调重弹了。
