柯林斯词典stoma /ˈstəʊmə/ 1. N an epidermal pore, present in large numbers in plant leaves, that controls the passage of gases into and out of a plant 氣孔[botany] 返回 stoma剑桥词典one of the many pores (= very small holes in the surface ) on a leaf or stem of a plant through which gases are able to pass in and out （植物葉子或莖表麪的）氣孔 返回 stoma