孔石：一般是奶油色或淡红色，由温泉的方解石沉积而成。因水流从石头中穿过而形成很多小孔，这些小孔常用合成树脂或水泥填满，否则需要大量的养护工作。属于石灰石和大理石。
孔石莼是一种资源量较大的大型绿藻，在我国主要海区均是优势物种。
Ulva pertusa, a kind of marine macroalgae, is a preponderant algae in Chinese sea area.
结果显示，不论营养盐浓度如何，高密度的孔石莼皆能显著抑制浮游微藻的生长。
The growth of P. subcordiformis is strongly depressed by high density U. pertusa even at high phosphorous availability.
从海洋绿藻孔石莼中分离到一种凝集素基因序列，为培育抗病虫作物新品种提供了新资源。
A novel lectin gene sequences isolated from Ulva Pertusa L., a kind of the Marine green alga, would play potential use in the breeding of new crop varieties against plant diseases and insect pests.
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