Nothing is more important than the fact that... 沒有什么比這更重要的是;But the problem is not so simple. Therefore 然而問題并非如此簡單，所以…;However, we have to look at the other side of the coin, that is... 然而我們還得看到事物的另一方面，即…

1. Taking all these factors into consideration, we naturally come to the conclusion that…把所有這些因素加以考慮,我們自然會(huì)得出結(jié)論……

2. Taking into account all these factors, we may reasonably come to the conclusion that …考慮所有這些因素,我們可能會(huì)得出合理的結(jié)論……

3. Hence/Therefore, we’d better come to the conclusion that …因此,我們最好得出這樣的結(jié)論……

4. There is no doubt that (job-hopping) has its drawbacks as well as merits.毫無疑問,跳槽有優(yōu)點(diǎn)也有缺點(diǎn)。

1.表示原因

1)There are three reasons for this.

2)The reasons for this are as follows.

3)We have good reason to believe that...

4) There are several causes for this significant growth

in...， firstly .... secondly...， last but not least (finally)...

5) There are many (different/several) reasons for this change (decrease/growth) of... For one thing，...For another，.... ，In addition，...

6). The chief reason why...is that...

2.表示好處

1)It has the following advantages.

2)It benefits us quite a lot.

3)It is of great benefit to us.

例如：Books are like friends.They can help us know the world better，and they can open our minds and widen our horizons.Therefore，reading extensively is of great benefit to us.

3.表示壞處

1)It has more disadvantages than advantages.

例如：However，everything divides into two.Television can also be harmful to us.It can do harm to our health and make us lazy if we spend too much time watching television.