enter for
1. 报名参加
Our team has entered for the competition.
我们队已报名参加比赛.
enter into
1. 加入; 开始
They have entered into a contract with a firm.
他们已与一家公司签订了合同。
2. 构成……的一部分
Flour has largely entered into our diet.
面粉已成为我们的主食之一。
3. 考虑; 讨论
We'll enter into the next issue this afternoon.
今天下午我们讨论下一个议题。
enter on/upon
1. 开始; 着手干
They have entered on their new duties.
他们已开始担任新职。
enter up
1. 登录; 记下
Have the payments been properly entered up?
付款已按要求记上了吗?