吃透英语课本，提升在校竞争力
phrase. 没关系。
Maybe there's no need for an upgrade and that's OK.
也许不需要升级也没关系。
That's OK.between sisters but becomes dangerous territory when you're talking to the children of friends or acquaintances.
在姐妹之间这是可以的，但当你和朋友或熟人的孩子交谈时，这就变成了危险的领域。
I'd just like to ask you a few questions about your lifestyle. It that's OK with you?
我想问你几个关于你的生活方式的问题。你觉得可以吗？
I assume that most students taking the introductory level class would have little or no experience with archeological research, but that's ok.
我想大多数上入门级课程的学生的考古研究经验都是很少或没有的，但没关系。
That's OK. everyone makes mistakes.
没关系，每个人都会犯错。
