3.to grit your teeth咬紧牙关；坚持忍耐
There is going to be hardship, but we have to grit our teeth and get on with it.困难是会有的, 但我们一定要咬牙坚持下去。
Gritting my teeth, I did my best to stifle one or two remarks.我咬咬牙拼命把嘴边的一两句话压了下去。
'Thanks.' He spoke through gritted teeth.他咬着牙说：“谢谢。”