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- The little boy was not good at arithmetic. 这个小男孩算术不太好。
- She grounded her pupils well in arithmetic. 她给自己的学生打下良好的算术基础。
- He got the answer by mental arithmetic. 他用心算得出了答案。
- He is good at mental arithmetic. 他擅长心算。
- The marriage was held to be valid. 这一婚姻关系是有效的。
- I'm good at history but not so hot at arithmetic. 我的历史成绩不错，但算术不太好。
- He brushed up on fractions before taking the arithmetic test. 在参加算术考试前他又重温了分数。
- The ticket is valid for one month. 这票子一个月内有效。
- A credit card is not a valid proof of identity. 银行发的支票保付卡不是有效的身份证明文件。
- arithmetic validation 算法验证
- A statement or an argument used in such a validation. 证词，证言用于这种证实的陈述或辩论
- What's the correct answer to this arithmetic question? 这道算术问题的正确答案是什么?
- My brother is poor at arithmetic. 我弟弟的算术很差。
- Her school report shows that she is weak at/in arithmetic and biology. 从她的学习成绩单可看出她算术和生物成绩差。
- This license is no longer valid. 这张执照不再有效。
- Some hard problems in arithmetic bewilder me. 算术上一些难题使我糊涂。
- The cheque is not valid if it were not signed by the finance director. 如果没有主管财务的董事签字支票就无效。
- We do addition and subtraction in arithmetic. 在算术里，我们作加减运算。
- The boy used to be no good at arithmetic. 过去那男孩算术总是不行。
- To solve by means of arithmetic. 计算用算术方法解决
