21.The reasons for this phenomenon may be obvious . / There may be some obvious reasons for this phenomenon . 可能有几点很明显的原因导致该现象。
22.… is mainly due to the following reasons / factors . ……主要是由于以下原因/因素。
23.There are many factors deciding / influencing … 有许多因素决定/影响……
24.Effective measures should be taken as soon as possible to … 应该尽快采取有效的措施来……
25.It is an urgent thing to take effective methods to solve this problem . 当务之急是采取有效的方法解决这一问题。
26.Facing … , we should try our best to figure out the ways to change this situation . 而对……,我们应该努力想办法改变这种局面。
27.The following ways can be taken to … 可以采用下列方法来……
28.… is an effective way to … ……是一个……的有效的方法。
29.By dong … , one person can … 通过……,一个人可以……
30.In order to … , … should … 为了……,……应该…
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