安全灯丢失。

Safety lamps missing.

他不小心关掉了安全灯，毁了胶片。

He accidentally turned off the safelight, ruining the film.

在安全灯下你只能看到物体的轮廓。

You can only see the outlines of objects under the safelight.

在开始冲洗照片之前，确保安全灯已经打开。

Make sure the safelight is on before you start developing the photos.

红色安全灯对于黑白胶片处理是必不可少的。

The red safelight is essential for black and white film processing.

安全灯让摄影师可以在暗房中工作而不会曝光胶片。

The safelight allows photographers to work in the darkroom without exposing the film.

所有骑手均配备反光背心及安全灯。

All riders are equipped with reflective vests and safety lights.

关掉普通的灯，打开安全灯。

Lights out. Turn out normal lights and work under a light red safelight .

关灯: 关掉普通的灯,打开安全灯.

Lights out. Turn out normal lights and work under a light red safelight.