做替补队员，坐冷板凳：warm the bench，be benched, ride the bench ,on the bench
Bob has been warming the bench for three seasons and he hopes the coach will let him play this year.
鲍伯连续三季比赛都坐冷板凳，他希望今年教练能够让他参加比赛。

替补队员：substitute
When a member of the team is injured, a substitute plays in his place.
球队若有队员受伤，替补队员就代替他上场。

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