霉菌

zài píng gài shang yǒu yī céng báo báo de méi jūn

在瓶盖上有一层薄薄的霉菌。

There is a film of mould over the bottle cap.

bǐng gān shang bù mǎn le lǜ sè de méi jūn

饼干上布满了绿色的霉菌。

The biscuits were covered in green mould.

huī sè de méi jūn pá mǎn le qiáng miàn

灰色的霉菌爬满了墙面。

Grey mould covered the walls.