光

guāng piàn shang shén me dōu méi yǒu xiǎn shì

X光片上什么都没有显示。

Nothing showed on the X-ray.

tā de fèi bù zhào le guāng zhī hòu cái fā xiàn yǒu wèn tí

她的肺部照了X光之后才发现有问题。

The problem was only discovered when her lungs were X-rayed.