If identified as potential adversaries, objects appear red.

如果识别为潜在的敌人，目标显示为红色。

youdao

In infrared light, shorter wavelengths look blue, and longer wavelengths appear red.

红外光下，较短的波长会程现蓝色，而较长的波长则程现红色。

youdao

If an object can reflect red light but absorbs other colors, it will appear red in sunlight.

如果某物能反射红光而吸收其他颜色，那么它在阳光下就会显出红色。

youdao

They appear red. Light waves from an object speeding toward you will have shorter wavelengths.

VOA: special.2009.04.29

Comments appear in red. I can see those.

注释是红色的，我可以看到这些注释。

麻省理工公开课 - 计算机科学及编程导论课程节选

Troublesome red rice shoots can appear amid the preferred white rice.

VOA: standard.2010.06.17

Most MRSA infections acquired in community settings present themselves as sores or boils and often appear red, swollen, painful or with drainage such as pus, the CDC says.

CNN: NFL stars no match for bacteria

States separated by 10 or more percentage points appear in red (Republican) and blue (Democrat).

FORBES: Magazine Article

In your rearview mirror, flashing red lights appear.

FORBES: Just say, "No comment"