sulfur|sulphur

农民用硫磺处理土壤以防止害虫。

Farmers ___sulfur the soil to protect against pests.

这种药膏含有硫磺，可以帮助治疗皮肤病。

This ointment contains ___sulphur, which can help treat skin conditions.

这些火柴头含有硫磺，所以闻起来很刺鼻。

The match heads contain ___sulfur, which gives them a strong smell.