Whistle signal
[电] 汽笛讯号
🧩 词语组成解析
whistle
['wɪsl]
vi. 吹口哨，吹哨子，鸣汽笛;呼啸;（动物）发出刺耳的叫声;吹口哨召唤;
vt. 由吹口哨而发出;吹口哨召唤;用哨声使…行动;
n. 口哨，哨子;汽笛;哨声，笛声;啭鸣声：尖厉高音;
signal
['sɪgnl]
n. 信号，暗号;预兆，征象;动机;导火线;
vt. 向…发信号;用动作（手势）示意;以信号告知;
vi. 发信号;
adj. 显著的，优越的;暗号的，作信号用的;
sign记号，信号+al表名词 → 信号
🗣️ 情景例句
I'd just like to repeat, do not be late!
我只想重复一遍，别迟到！
If they say you are good, ask yourself if it be ture.
若有人称赞你，要自问对不对。
and we have only to turn to that extraordinary discovery of echo-location in bats to see a case in which the voice plays a strictly utilitarian role.
我们只要看一看蝙蝠回声定位这一极不寻常的发现，就可以探究一下声音在什么情况下有绝对的实用价值。