Light elements on the walls of the tunnel refer to arriving trains.

隧道墙上的光源都是为经过的火车而设计的。

youdao

The research revealed a powerful way to decipher the identity of the light elements in the core.

这个研究显示了一种强有力的方法来解密地核中的轻物质的身份。

youdao

This instrument can be used for gas analysis and determine of isotopic abundance of light elements.

此仪器可用于气体分析以及轻元素的同位素丰度测定。

youdao

In addition to these goodies, the solar wind carries light elements such as helium to the moon's surface and leaves them there.

ECONOMIST: Spaceflight

Planets, on the other hand, will be richer in heavy elements than the star they orbit, since there were fewer light elements left over by the time they formed.

ECONOMIST: Twinkle, twinkle, giant planet

Because of this he looks at leadership differently than those of us in business, and he sheds a different light on the elements of leadership.

FORBES: Learning Leadership from a New Perspective