1.To continue in the same state or condition:
保持不变：继续保持同一种状态或情况：
These matters remain in doubt.
这些事情仍然值得怀疑
2.To continue to be in the same place; stay or stay behind:
留下：逗留在同一地方；停留或者留下：
We are remaining at home.
我们留在家里
3.To be left after the removal,loss,passage,or destruction of others:
余留：在其他事物移走,丢失,走开或毁坏之后仍留下来：
Only a few trees remain.See Synonyms at stay 1
只留下了一些树参见 stay1
4.To be left as still to be dealt with:
尚待：剩余的仍需要处理的：
A cure remains to be found.
尚待发现的疗法
5.To endure or persist.
持久或坚持
6.留下；遗留
I went to the city,but my brother remained at home.
我去了城市,可弟弟留在了家里.
7.继续
Peter became a judge but John remained a fisherman.
彼得当了法官,但约翰仍然是个渔民.
He's determined to remain loyal to the team whatever comes his way.
他决心不管发生什么事都忠于球队.
The death of the innkeeper still remains a mystery.
客栈老板之死仍然是个谜.
习惯用语：it remains to be seen
还要看情况发展
参考资料：
非常详细的