n.(船舶或飞机发出的)紧急呼救信号，紧急求助的请求

SOS! We're lost in the forest and need immediate help!"
SOS！我们在森林里迷路了，需要立即救援！
The distress signal from the sinking ship was an urgent "SOS".
沉船发出的紧急求救信号是"SOS"。
SOS, our plane has experienced engine failure over the ocean!"
救命！我们的飞机在大洋上空出现发动机故障！
She wrote "SOS" on the ground in large letters for the rescue team to spot.
她在地上用大写字母写下"SOS"以便救援队能发现。
He sent out an SOS message when he realized his boat was taking on water.
他意识到船只进水后发送了一条SOS求救信息。
They were forced to send an SOS after being stranded in the Arctic ice for weeks.
在北极冰层中困了几周之后，他们被迫发出了SOS信号。
The hiker used her whistle to blow three short and three long blasts - an SOS signal.
这位徒步者用口哨吹出三短三长的哨声，这是一种SOS求救信号。
In the old days, telegraph operators would transmit "SOS" as a Morse code: ... --- ...
在过去，电报员会用电码方式发送"SOS": 三点连缀、三横杠连缀。
The teacher spelled out "SOS" with her hands, silently asking for assistance during class.
老师用手势拼出"SOS"，在课堂上无声地请求帮助。
After running out of food and water, the survivors etched "SOS" into the sand with a stick.
在食物和水耗尽之后，幸存者们用棍子在沙滩上刻出了"SOS"字样。