Gritting my teeth, I did my best to stifle one or two remarks.

我咬紧牙关，硬是把一两句意见咽了回去。

I expect they'll be gritting the roads tonight.

我预料他们今晚要在路面上撒沙砾。

YOU can almost hear the gritting of perfect teeth.

你几乎可以听到那完美的牙齿咬紧的声音。

It takes gritting your teeth. It takes discipline.

你得咬紧牙关，你得有严格的纪律。

YOU can almost hear the gritting of those perfect teeth.

你几乎能听到咬牙切齿的声音。