• 1. four rules: 四则
• 2. Four rules of risk contro: 危险控制四原则
• 3. four rules of arithmetic: 加减乘除

更多释义

• 1.I have four rules.
  我这有四个规则。
  dict.yoduao.com
• 2.Here are four rules I've come to live by.
  以下是我生活的四条生活法则。
  dict.yoduao.com
• 3.Following the same steps, create the remaining four rules.
  遵循与上面相同的步骤，创建其余4条规则。
  dict.yoduao.com

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