There is a film of mould over the bottle cap.

瓶盖上有一层薄薄的霉菌。

《新英汉大辞典》

There is a film of mould over the bottle cap .

瓶盖上有一层薄薄的霉菌。

youdao

There is a film of mould over the bottle cap .

瓶盖上有一层薄薄的霉菌。

youdao