您要查找的是不是：
- This non sequitur invalidates his argument. 他不根据前提推理因而论证无效。
- The state or quality of being null. 无效无效的状况或性质
- My finding: Class C was a null set. 我的发现：等级C是一个空集。
- Kindly send us two samples of each class quote for. 报价时，请对每一个等级的各寄两个样品。
- The average age of the boys in this class is fifteen. 本班男生的平均年龄是十五岁。
- Henry is nowhere when it comes to the race for class president. 亨利在竞选级长中被远远抛在后面。
- Patience is a sine qua non for a good teacher. 做个优秀教师必不可少的条件是要有耐心。
- The diplomat was declared persona non grata. 这位外交家被宣布为不受欢迎的使节。
- She got cold feet when asked to recite in class. 当她被叫起来在班上背诵时害怕了。
- The act of making null and void. 废除使 ... 作废和无效
- She was kept in for an hour for talking in class. 她因上课说话被罚留校一小时。
- He is declared personal non grata and forced to leave the country. 他被宣布为不受欢迎的人而被迫离开该国。
- The students in our class number thirty. 我班总共有三十名学生。
- I was out and away the handsomest man in the class. 我是当时全班最帅的男子汉。
- Soon I dropped behind the rest of the class. 不久我就落在班上其他同志后面了。
- Pele was in a class of his own as a footballer. 贝利是举世无双的足球健将。
- He always travels first class expense is no object. 他出门总是用头等票－－费用不成问题。
- The contract was null and void because it was not signed. 这个合同无效，因为它尚未签字。
- She stood out as the best in the class. 她是班级里最出色的学生。
- I had had a few beers and was completely non compos mentis. 我喝了些啤酒就头昏脑胀了。
