请问 Jobs differ by post,not social standing.其中的by是什么意思,

By doing part-time jobs,students can __________ social exper not by chance是什么意思 英语翻译It is probably not by chance that young people in differ Powered by ****的,是什么意思? It is not safe to travel by standing at the road hoping to b 关于by的用法!请问by sight是什么意思,这也是一种by的用法吧,那么像这种用法的,比如说by chance啊等等 BY 是什么意思? "BY"是什么意思 everyone standing by her came to stand next to me 请问为什么stand Any packet ____ properly will not be accepted by the post of He is standing by my bike 翻译 请问by for这个词组是什么意思