key address

例句：

1. 1.The key to solving this problem lies in finding the right approach.
   解决这个问题的关键在于找到正确的方法。
2. 2.The meeting was a key moment in their negotiations.
   这次会议是他们谈判中的一个关键时刻。
3. 3.The key to success is hard work and dedication.
   成功的关键是努力工作和奉献。