医生建议在伤口上涂一层凡士林以防止感染。

The doctor recommended applying a thin layer of ___Vaseline to the wound to prevent infection.

冬天干燥时，我经常用凡士林来防止嘴唇干裂。

I often use ___vaseline to prevent chapped lips in dry winter.

她在伤口上涂了凡士林以防感染。

She ___applied Vaseline to the cut to prevent infection.