我们在野餐时涂了香茅油来防止蚊虫叮咬。

We applied ___citronella oil to prevent insect bites during the picnic.

这款香皂含有香茅油，闻起来有清新的柠檬香气。

This soap contains ___citronella oil, which gives it a fresh lemony fragrance.

我们在露台上种植了几株香茅来驱赶蚊虫。

We planted some ___citronella on the patio to keep mosquitoes away.