红外线可以穿透烟雾。

Infrared rays can penetrate smoke.

电视遥控器使用红外信号。

The TV remote uses infrared signals.

红外摄像机在夜间也能工作。

Infrared cameras can work at night.

红外线传感器有助于夜视。

The infrared sensor helps in night vision.

红外线桑拿对健康有益。

The infrared sauna is beneficial for health.