This is because of the thioglucosides in it.

这是因为其中含有硫葡糖苷。

When you grind the stems of the wasabi plant, the cells break down, releasing the thioglucosides.

当你研磨芥末植物的茎时， 细胞会分解， 释放出硫葡糖苷。

According to UCLA's Science and Food site, thioglucosides are " sugar glucose with sulfur-containing organic compounds" .

根据加州大学洛杉矶分校的科学与食品网站，硫葡糖苷是“含硫有机化合物的葡萄糖” 。