stand down
(a) (of a witness) leave the witness-box in a lawcourt after giving evidence (指证人)(作证後)退出证人席.
(b) withdraw (eg as a candidate in an election); resign from one´s position 退出(如竞选中); 退职
The President has stood down after five years in office. 总统执政五年後已经引退. stand (sb) `down (military 军) (order sb to) relax after an alert (命令某人)解除戒备状态
The troops (were) stood down
it was a false alarm. 部队解除了戒备状态, 原来是虚惊一场.