His brother is assiduous in the study of relativity.
他哥哥正刻苦学习相对论。
，
勉；
勉;;疲劳;，热情，积极;, 
;;;;;劳;;His brother is assiduous in the study of relativity.
他哥哥正刻苦学习相对论。
He is assiduous over his visitor.
他对来访者很
。
The book was the result of ten years’ assiduous research.
本书是十年苦心钻研
成果。
Inheritance is zero, the honesty first, study the second, the manner third, assiduous fourth, the hardhead fifth.
遗产为零，诚实第一，学习第二，礼貌第三，刻苦第四，精明第五。
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