noun · a term used in certain dialects for the leafy green vegetable bok choy (Brassica rapa subsp. chinensis)

这种油菜口感爽脆，非常适合用来清炒。

noun · the oilseed rape plant (Brassica napus) or its edible greens, often cultivated for oil production

这里的农民大面积种植油菜来榨油。