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1·You must measure the length by rule and line.

你必须准确地计量长度。《新英汉大辞典》

2·We must play the game by rule.

我们必须按照规则进行比赛。

3·Pay membership fees by rule.

按规定缴纳会费。

4·He has lived all his life by rule.

他已经按照准则生活了整整一生。

5·He can predict a typhoon by rule of thumb.

他能凭经验预测出台风。

6·Do you talk by rule then, while you are dancing?

那么说，你跳起舞来照例总得要谈上几句吗？

7·Science will conquer all mysteries by rule and line.

科学家会准确地揭开所有的神秘。

8·A good social order can only be guarded by rule of law.

一个良好的社会秩序只能靠法制。

9·He is very methodical in His work, doing everything by rule.

他做事有条不紊，每件事情都是按规则做的。

10·All kinds of statistical figures are kept for three years by rule.

各类统计数据规定保留三年。