5 1．However，though it has brought mankind merits，some undesirable side—effects have gradually come to the surface．

尽管它给人类带来好处，但一些副作用也渐渐表现出来。

52．Despite the adverse effects．．．has，it has its advantages．

尽管……有不利的影响，但它也有利处。

53．But every coin has its two sides．The negative aspects are also apparent．To begin with，．．．．To make matters worse，．．．．Worst of all…．

但正如每个硬币都有两面，它的不足之处也是显而易见的。首先，……；更糟的是，……；最后，……

54．Obviously，it has its drawbacks／disadvantages／negative effects as well as merits／advantages／positive effects．

显然，它既拥有优点(长处，积极的作用)，也有弊端(短处，消极的影响)。

55．The side-effects．．．has produced on us can be boiled down to three major ones：

 ……对我们产生的副作用归纳起来主要有三个：

56．Undeniable，．．．is good in many aspects；however，it has its disadvantages．too．For

one thing，it．．．；for another，it．．．

不可否认的是，……在很多方面是好的，然而，它也有不利之处。首先，……；其次，……

57．It is no easy job to render the reasons for this complicated phenornenon which involves several factors．

给这个牵涉到几个因素的复杂现象作出解释不是一件容易的事。

58．A number of factors could account for／contribute to／lead to／result in the change／success／increase．

许多因素可以说明(导致，引起)这个变化(成功，增长)。

59．There are a variety of reasons for this phenomenon．

关于这个现象有各种各样的理由。

60．A thorough examination proves the groundlessness of arguments supporting…

深入的调查证明了支持……的争论是毫无根据的。