SOS
noun[S]
uk/ˌes.əʊˈes/us/ˌes.oʊˈes/arequestforhelp,especiallybecause ofdanger:
求助；（尤指）紧急呼救（信号）Within anhourof theshiptransmittingan SOS(message/call), sixboatshadarrivedandstartedarescueoperation.这艘船发出紧急呼救信号后不到1个小时，就有6艘船到达现场实施救援。
Thehospitalsentout an SOSforextrabloodsupplies.这家医院发出紧急求助信息，希望获得额外的血液供应。
Signs, signals and symbols
- beacon
- breadcrumb
- cryptanalyst
- delimiter
- digital badge
- ideogram
- indicator
- lagging indicator
- leading indicator
- litmus test
- logograph
- marksomething/someoneoff
- prompt
- signboard
- signifier
- signing
- status symbol
- the all-clear
- torch
- totem pole
You can also find related words, phrases, and synonyms in the topics:
Emergency services in general