丝 Ⅰ名词1.(蚕丝) silk 生丝 raw silk; 蚕吐丝。 silkworms spin silk. 这是用丝织成的。 it is woven of [from] silk.2.(像丝的物品) a threadlike thing 肉丝 meat cut into slivers; shredded meat; 铜丝 copper wire; 一丝亮光 a thread of light; 雨丝 fine drizzle; 钨丝 tungsten filament; 蜘蛛丝 cobweb3.(极少或极小的量) a tiny bit; trace 一丝不差 not a bit of difference; 她脸上没有一丝笑容。 there isn't a trace of a smile on her face. 一丝风也没有。 there isn't a breath of air.Ⅱ量词(重量单位) si, a unit of weight (=0.0005 grams)