Because
因为───because;正───just
She's been off work because of sickness.───她因病没有上班。
She resigned because of ill health.───她因健康状况不佳而辞职。
They are here because of us.───他们是因为我们来这里的。
It's been a while since I respond to your message. I guess because I have not been able to help out any activity that you are planning.───有一段时间没有回应你的发言了，我想是因为对于你计划的活动我都帮不上忙罢！？。
It was one of the last afternoons I had her around because her place in school had already been reserved.───那是她和我在一起的最后几个下午之一，因为她在学校里报了名。
because Beijing is ready to make all preparations necessary to host the Games.───是因为北京已做好了所有必要的准备工作来举办奥运会。
Throw away the apple because of the core.
He is called Mitch, because his name is Mitchell.
Don’t throw away the apple because of the core.
I couldn't sleep because the bed was so uncomfortable.
Expericence is a hard teacher because she gives the test first, the lesson afterwards.