请问这3个there,their ,they are.请问这3个有什么区别～并举列说明～其实我这个their最搞不懂～我发现它在英语上也不经常用啊～也可以跟我讲讲这个their的意思～或者给我用这个字造几个句子～

请问这3个there,their ,they are.请问这3个有什么区别～并举列说明～其实我这个their最搞不懂～我发现它在英语上也不经常用啊～也可以跟我讲讲这个their的意思～或者给我用这个字造几个句子～ May ,4th to Sep,30th请问这是什么意思? 机械制图中 数字后面有个Th是什么意思我发展一张图纸中有个数字是这样的“30.15Th±0.2” 请问这里的Th是什么意思? 有th的单词是 th?问号是一个字母,要3个还有？th？的单词一个 请问下面这段论述出自孔子的哪篇语录?其原文是什么?谢谢!if there be righteousness in the heart there will be beauty in the character.if there be beauty in the character there will be harmony in the home.if there be harmony in th 请问It's very important for parents to be there for their children there are many teachers in the world.they____their students knoeledge.they love their students.when their students are _____danger,they try their_____to protect the students.on may 12th ,2008,a lot of students____in the earthquake.at the moment,they Their shirt are there 对Their提问 th前面加3个字母,成单词 求一句话的理解（英文）原句：There is no necessarily intrinsic connection between a word and the thing it refers to; th relation is purely conventional.请问这句话怎么理解? 请问95th percentile concentration 麻烦再帮看看这句话A prevalent attitude amongst many nurses in the group selected for study was that there was no reward or recognition for not utilising the paid sick leave entitlement allowed them in their employment conditions.Therefore,th there with fourth they 划线都是th There are their shirts[复数] There are their shirts[同义] 请问英语 月 日 日子是不是都要加个th?比如 Sept.1 1后面一定要加个th?为什么呢？知道的朋友说下 英语翻译There's colors on the street Red,white and blue People shufflin' their feet People sleepin' in their shoes But there's a warming sign on the road ahead There's lot of people sayin' we'd better off dead Don't feel like Satan,but I am to th 英语翻译1,2,3之后的数字,例如“4th,12th,9th”把这三个翻译一下（不是中文）把th变为复杂形式