例句： 1、A day is about one thirtieth of a month. 一天大约是一个月的三十分之一。 2、One second of arc movement is one thirtieth of a millimetre. 一弧秒的移动是一毫米的三十分之一。 3、The current contract with the actors union ends June thirtieth. 目前其与演员工会的.合同将在六月三十结束。 4、The last day in September is the thirtieth. 九月的最后一天是三十日。 5、Thirty-three thousand people think that Thursday is their thirtieth birthday. 三万三千人认为星期四是他们三十岁生日。 上一篇：have been doing后面加什么词 下一篇：progress名词可数吗 |