英语好的朋友帮帮我做做翻译！！！~~~

51.Mary think that carry out her plan with her own ability is very difficult.
52.Luckyly,there is a hospital near us,we took him to there immediately.
53.As we all know,no rapping off lead to some of the questions between us.
54.I have the honour to introduce Doctor Green to you.
55.Please order a ticket to Beijing for me.
56.人口如此众多的利与弊长期以来一直是经济学家讨论的主题
57.出生率的降低可能会引起失业，因为它导致商品的市场下降了
58.读完这封信后，老人非常失望，他用颤抖的手将信撕成碎片
59.他的测试的失败，让他意识到定期地复习功课有多么重要
60.当她读这本小说时，她忍不住想起了在乡下的那5年

Mary thought that depends on own strength to carry out her plan is very difficult

Nearly has a hospital luckily, we have delivered him to there immediately.

It is well known, our many questions are partially at least because has not been able to exchange the thought to cause?

I am honored so much introduce Dr. Grimm to you.

please give a ticket which go to beijing.

大量人口的好处和坏处是许多经济学家讨论的课题之一

越来越少的生产率导致了失业，因为一个衰退的市场使产品积压。

读完这封信以后，这个老人很失望，颤抖着手把它一点一点的撕碎

这次考试的失败使他意识到了有规律的复习是多么的重要

当她读这个小说的时候，她情不自禁的想起了在乡下的那五年。

可能有些错误，需要你自己检查！