some VS several后面都加可数名词复数时,有何区别?

some VS several
后面都加可数名词复数时,有何区别?

some指一些,许多,several指两三个.
some作代词时可以跟of连用,several也有这个用法!
如some of the apples 苹果中的一些
如several of the paintings were destroyed.有几幅画被毁了.
several
adj.几个,个别的,单独的
pron.几个
some
adj.一些,少许,若干,有些,大约,相当的
pron.一些,若干,有些,某些
某种意义上说,several 比some 更少一些,且some 还可修饰不可数名词,several 只可修饰可数.