“蚕丝”造句
养蚕是为了得到
蚕丝.
Silkworm culture is practised in order to get silk.
在
蚕丝中, 更确切地讲,这些链是反向平行的.
In silk, it would be better to describe the chains as being antiparallel.
请描述
蚕丝与蜘蛛丝的分子结构.
Describe the molecular structures of silk and the spider silk.