...a nightshirt which reached to his knees...是什么意思？

...a nightshirt which reached to his knees...

长及他膝盖的睡衣

nightshirt

n. 男用长睡衣，夜衣，男用睡衣；

例句
...a nightshirt which reached to his knees...
长及他膝盖的睡衣

which

pron. 哪一个，哪一些，哪个，那，指前面提到的事物；adj. 哪一个，哪一些；

例句
...the latest date at which a foetus can be aborted.
能够打胎的最迟日期

reached

v. 到达( reach的过去式和过去分词 )，联络，伸出手臂，延伸；

例句
When the barge reached the shrine, acolytes removed the pall.
当驳船抵达圣地时，辅祭除去了柩衣。

to

prep. 向，朝着，到，关于，属于；adv. 朝一个方向的，到某种状态，关闭；

例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

his

pron. (he的所有格)他的，(he的物主代词)他的东西；det. 属于他的，用于名词前，自己的，指某人的，上帝的；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

knees

n. 膝( knee的名词复数 )，膝盖，（裤子的）膝部，坐下时)大腿朝上的面；

例句
We beg the Government on bended knees not to cut this budget.
我们恳求政府不要削减这项预算。