some：
det.(与不可数名词或复数可数名词连用)一些，若干;(指一集体中的某些成员或一事物的某些类型)某些，部分，有的;好些;不少的;相当多的；
pron.(数量不确切时用)有些人，有些事物;部分;有的;有些;若干；
adv.(用于数词前，意同approximately)大约，差不多;稍微;有点；
例句：
Researchers in this field have made some important new discoveries.
这个领域的研究人员有了一些重大的新发现。
Teachers are up against some major problems these days.
老师们最近面临着一些重大问题。
Digital television has been around for some time now.
数字电视已经面市一段时间了。
A solution is still some way off.
解决办法尚需时日。
Everyone experiences these problems at some time in their lives.
每个人在人生的某个阶段都会经历这些问题。
Some people can only operate well under pressure.
有些人只有在压力下才工作得好。