当表示中文意思，进入讨论成为……的一部分研讨分享体谅时，enter要加into
例如
There will be a strong incentive to enter into a process of negotiation.将会有一个强烈的刺激来进入谈判的过程。
By opening a novel， I can leave behind my burdens and enter into a wonderful and mysterious world where I am now a new character.打开一本小说，我就可以放下负担，进入一个奇妙而神秘的世界，在那里我现在是一个新的人物。
enter什么时候加into
“enter”后面加“into ”，表示开始从事、进入、参加、开始。
例句：How could you enter into my office without my permission?
译文：你怎么能不经我允许就擅自进入我办公室呢
下列情况，enter 后通常接介词 into：
(1) 开始(做某事)
I dared not enter into conversation with him. 我未敢与他交谈。
He entered into business at the age of 25. 他25岁时开始经商。
(2) (开始)讨论，研究，处理
Let’s enter into the subject of taxes. 咱们来讨论一下税款问题。
We need not enter into details. 我们不必讨论(研究、处理)细节。
(3) 积极参加，参与，投入
He entered into our plans with terrific zest. 他满腔热情地参加了我们的项目。
The party was successful because everyone entered into the spirit of the
thing. 这次聚会因大家积极参与所以很成功。
(4) 达成(协议)，缔结(条约)
We entered into a solemn bond. 我们缔结了一项正式协定。
You shouldn’t enter into contract until you have studied its provisions
carefully. 你应该先仔细研究合同的条款，然后再签订。
(5)(不用于被动语态)形成某事物的一部分：
This possibility never entered into our calculations. 我们从未考虑过有这种可能性。
Flour has largely entered into their diet. 面料已成为他们的主食之一。
(6) 懂得，领略，体会，理解：
He didn’t enter into her mood. 他不体谅她的心情。
I can enter into your feelings at the loss of your wife. 我能理解你失去妻子后的心情。
(7) 表示进入某具体东西且强调深入其内时(若不强调则可不用)：
The arrow entered into his head. 箭射进了他的头。
We entered into a woody mountain. 我们进入了一片山林里。
