预警系统 yù jǐng xì tǒng

DEFINITIONS

  1. early warning system

CHARACTERS

预 yù
HSK 4
prepare, arrange; in advance
警 jǐng
HSK 4
guard, watch; alert, alarm
系 xì
HSK 1
system; line, link, connection
统 tǒng
HSK 5
govern, command, control; unite