the key

... 的答案(线索、办法)

the key to doing sth

做什么什么的关键，是介词，to词性不会发生变化的，只有用法上的区别

例句

1、Reading is the key to the treasure house of ideas.

顶( 5 )

读书是打开知识宝库的钥匙。

2

The key to the whole affair was his jealousy.

顶( 2 )

整个事情的症结是因为他忌妒。

3

Do you know the key to the problem?

顶( 1 )

你知道这道题的答案吗？

4

The key to this question lies in overcoming Han chauvinism.

顶( 1 )

解决这个问题的关键是克服大汉族主义。

5

Knowledge is a treasure, but practice is the key to it.

顶( 0 )

[谚]知识是宝库，实践是钥匙。

6

Herein lies the keys to the questions.

顶( 0 )

里面包含着问题的答案。

7

Allocation is the key to achieving your goals.

顶( 0 )

资产配置是实现你的目标的关键。

8

This was the key to success of our initial talks.

顶( 0 )

这就是我们当初会谈取得成功的关键所在。

9

The key to objectivity is to accept subjectivity.

顶( 0 )

客观的关键是接受主观的看法。

10

Appreciation is the key to happiness.

顶( 0 )

幸福的第一个秘诀是感激。