sign up for

基本解释

So where do I sign up for the time machine?
那么我到哪里报名参加时光旅游呢？
People may disagree with me, but I believe you should sign up for the most popular social networks regardless of whether you are going to use them all.
有人可能不同意我的观点，不过我相信你可能注册大多数的流行社会化网站，而不关心是否要使用它们。
But customers who sign up for this are actually enrolling in a program that charges them $14.95 a month for what are supposed to be discounts on amusement parks and movies, among other things.
但那些签单的客户实际上却是注册了一个每月向他们收费14.95美元的项目，注册这个项目可以在他们去游乐园、看电影或参加其他活动时享受到折扣价。

And also, for those of you that did sign up for the pizza forum tonight, that's going to be at 5 o'clock, it's in room 56-502, so we'll see some of you tonight for that as well.
另外，对于报名参加,今晚的披萨聚会的同学，请注意聚会的时间是五点整，地点在，56-502，房间，因此，我们在今晚还会见到你们中的部分同学。
麻省理工公开课 - 化学原理课程节选
And that's where like, in Phase One, you can only sign up for 10 units worth of classes.
比如说，在第一阶段，你只能报10个学分的课程。
关于授课系统 - SpeakingMax英语口语达人
In particular, please go to it today, you will find a form there that you need to fill out to register for, or sign up for rather, a recitation.
特别声明，请今天就去看，你会找到需要填写的,一份注册表单，或者是复习课的签到表单。
麻省理工公开课 - 计算机科学及编程导论课程节选