His brother is assiduous in the study of relativity.
他哥哥正刻苦学习相对论。
，勤
顾周到；殷勤;;;，热情，积极;, 勤
;;;;;;;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.
他对来访者很殷勤。
The book was the result of ten years’ assiduous research.
那本书是十年苦心钻研
。
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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