signal (EN)

名词，动词，形容词

名词 “signal”

1. 信号
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   The firefighter used a whistle as a signal for everyone to evacuate the building immediately.
2. 信号（用于无线电、电视、电话和互联网的电磁作用）
   The TV stopped working because it lost the signal during the storm.
3. 信号灯（如灯光或信号机）
   The traffic signal turned green, indicating it was safe to proceed.
4. 迹象
   The dark clouds in the sky were a signal that a storm was approaching.
5. 有效信息
   As data scientists, we try to distinguish the signal from the noise in complex data.

动词 “signal”

1. 发信号
   She signaled for help by waving her arms frantically.
2. 预示
   The dark clouds signalled that a storm was approaching.
3. 打信号（用灯光或手势表示车辆将要转弯或改变方向）
   He signaled left before merging into the other lane.

形容词 “signal”

1. 杰出的
   Her signal victory in the science competition earned her a scholarship to a prestigious university.