Answer:

1.The key to the success of this project
【超级单词】key除作名词"钥匙"外，后接介词to，表示"...的钥匙，...的答案，...的关键"。

individual to individual.
【超级短语】不及物动词vary 的用法。搭配为：vary ... from ... to 各不相同。

to be operated manually
【超级短语】have to通常指由于客观原因则不得不做某事，意思为"不得不"。 其否定形式意思是"不一定"或"没有必要"。

students' being late for
【超级句型】be used to+doing/noun，表示过去习惯于做某事。used to+do，表示过去有规律的习惯性动作或状态，而现在已不存在了。
【超级短语】be late for,迟到。
【超级句型】one's doing,非谓语动词的复合结构。

E-mail instead of telephone
【超级短语】Instead of 的意思是"代替......"、"而不......"，后面常跟名词、代词和动名词，偶尔也跟复合结构。

advised not to travel to that country at the moment
【超级单词】advise 一般用法： advise sb. to do; advise doing
特殊注意： 后面的宾语从句要用虚拟语气。即：advise that sb. (should) do的形式。

devoted himself to the community
【超级短语】be devoted to 有两个含义：A.专心致志于，献身于；B.热爱，很喜欢。作为动词的devote常用下列成语类的搭配：devote oneself/one's life to sth/doing sth.

the cost of sacrificing/loss of other species
【超级短语】at the cost of（以......为代价），其含义和用法与at the expense of相同。另at all costs意为"不惜一切代价"。

uted it to her firm belief in the future
【超级短语】"attribute...to"，"把...归因于..."是大学英语四级考查率极高的一个语言点。

not to let their parents down
【超级短语】let...down(使......失望)，形容词表示失望有disappointed.

er/take into account the factor of increasing price.
【超级单词】Take... into account=take... into consideration 把...考虑在内

he notice me and shouted with happiness
【超级句型】这是only引起的半倒装句，only+强调内容+助动词+主语+谓语+其它

alone discuss with him
【超级短语】let alone用作连词，译为"更不用说了"

to their parents
【超级短语】turn to sb. for help 求助于别人

have survived
【超级句型】在虚拟条件句中，如果表示与过去事实相反的情况，从句用过去完成时，而主句中则用"情态动词＋现在完成时"，即would/ could/ should/ might have done