The while bear relies on the huge centuries-old trees in the forest in many ways.
I stay inside while it's raining.
She never went there while her husband was alive.
There was never any trouble while we were living there.
Isobel is very dynamic, while Kay is more laid-back.
While I didn't know him all that well when we were students, I do remember him as a brilliant musician.
Your letter, while complete in other regards, avoided the subject of cost.
While walking I often whistle.
I'll tidy up while you make the dinner.
You hold the torch while I look inside.
While I was in London she was in Paris.
Someone opened the door while he was making his speech.
The two ministers have yet to meet, but may do so while in New York.
n. a while：一会儿；一段时间
The injection worked quite quickly and, after a while, he slept.
He was here a while ago.
a book that I read a little while ago
Why don't you both stay for a while?
They talked for a while and then went home together.
I lived in London for a while.
It will take quite a while to come to terms with what has happened.
I haven't seen him for quite a while.
n. all the while：一直；始终
All the while the people at the next table watched me eat.
I hugged him, and all the while I felt sick.
n. to be worth sb's while：值得某人去做；对某人有好处
Don't argue with him – it's not worth your while.
It's worth your while to book in advance.
n. the while：其时；当时