knees buckle

美 [niːz ˈbʌkl]英 [niːz ˈbʌkl]

knees buckle

1

I could see his knees buckle after that last punch .

在打出那最后一拳后我看见他的膝盖弯曲起来。
2

My knees still buckle every time I get on a stage .

每次我站在舞台上，我双膝都直不起来。
3

I feel my knees start to buckle .

我感觉我的膝盖开始发软了。
4

Stephen 's knees began to buckle beneath him .

斯蒂芬的双膝开始下屈了。
5

Bend the knees but no more than the tiptoes , knees inner buckle slightly .

屈膝下蹲，但膝不要超过脚尖，双膝盖略内扣。