while：
conj.雖然;在…期間;當(dāng)…的時(shí)候;與…同時(shí);(對比兩件事物)…而，…然而；
n.一段時(shí)間;一會(huì)兒；
v.消磨;輕松地度過；
第三人稱單數(shù)： whiles復(fù)數(shù)： whiles現(xiàn)在分詞： whiling過去式： whiled過去分詞： whiled
例句：
While a friendship hit the rocks.
然而一段友誼出現(xiàn)裂痕。
But while taking a vacation may provide short-term relief from stress, it won't cure burnout.
然而渡假僅僅是對壓力的短期緩解，它不會(huì)根治過度疲勞。
He'll do the job if you make it worth his while.
你要是給他的報(bào)酬豐厚，他會(huì)做這份工作的。
You'll water the plants while I'm away, won't you?
我外出的時(shí)候請你給花草澆澆水，行不行？
I'll be back in a little while.
我一會(huì)兒就回來。