sulfur

The active volcano emitted a strong smell of sulfur into the surrounding air.

(Chinese) 活火山向周围空气中释放出浓烈的硫磺味。

Matches are tipped with a chemical mixture that often includes sulfur to help them ignite.

(Chinese) 火柴头涂有化学混合物，通常含有硫以帮助引燃。