several是啥意思?

several是啥意思? several 英语的意思是几个 several times的意思 several 的中文意思 是several thousand还是several thousands of ? against several days 什么意思? several Now several countries have sent astronauts into space.中文意思是什 是 other several months还是over several months 具体是several millions of students还是several million students several millions of several millions 哪个是正确表达法 several years ago,well-known的意思,