To cause to arrive or to be delivered to the recipient:使递送：使…到达或被传送到接受者：Let's send in a letter of protest.让我们递送一封抗议信
Sports To put (a player) into or back into a game or contest:【体育运动】 送选手参加比赛：送（选手）进入或回到比赛或竞赛：The coach is sending in the kicker.教练正在送踢球者参加比赛
To cause (someone) to arrive in or become involved in a particular place or situation:使陷入：使（某人）到达或陷入特别的场所或环境：The commander sent in the sappers. It's time to send in the lawyers.指挥员派去工兵。是该去找律师的时候了