3 sentences

1. 大批舰船在港口待命。

   dà pī jiàn​chuán zài gǎng​kǒu dài​mìng.

   A large number of naval vessels are on standby in the port.

   Source: Dong Chinese Dictionary

2. 明天凌晨4点待命。

   míng​tiān líng​chén4 diǎn dài​mìng.

   Be on standby tomorrow at 4am.

   Source: OpenSubtitles

3. 救援队伍已经集合完毕，原地待命。

   jiù​yuán duì​wǔ yǐ​jīng jí​hé wán​bì, yuán​dì dài​mìng.

   The rescue team has assembled and is on standby.

   Source: Dong Chinese Dictionary