Keyless
a. 无键的, 不用钥匙上发条的
🗣️ 情景例句
Don't worry.
别愁。
I was not aware that I was in danger.
我不知道自己处于危险中。
Fortunately, a pilot saw the signal and sent a message by radio to the nearest town.
幸运得很，一位飞行员看到这个信号，用无线电给最近的城镇发了报。