She twisted in her chair when I called her name.
我唤她的名字时，她坐在座椅上转过身来。
She shifted into a more comfortable position on the chair.
她换了一个更舒适的姿势坐在椅子上。
We wanted to buy the chairs but another couple were bidding against us.
我们想买下那几把椅子，但另一对夫妇在同我们较劲出价。
The chairs were covered in some sort of plastic stuff.
椅子都包了一种塑料膜。
He held onto the back of the chair to stop himself from falling.
他扶住椅子后背，以免摔倒。