随时待命 suí shí dài mìng

DEFINITIONS

  1. on call
  2. always available
  3. ready at all times

CHARACTERS

随 suí
HSK 4
follow, listen to, submit to
时 shí
HSK 1
time, season; era, age, period
待 dài
HSK 5
treat, entertain, receive; wait
命 mìng
HSK 4
life; destiny, fate, luck; an order, instruction