从远处看像一座巨大的拱门，它是一个连续的环，像一种方形面包圈。
Looking from a distance like a gigantic arch, it is a continuous loop, a kind of square doughnut.
本发明提供了一种生产六溴环十二烷的新工艺。
The present invention provides a new method to produce hexabromocyclododecane.
从月腺大戟根甲醇提取液的沉淀部分，鉴定了4种化合物，分别为二十九烷醇10、24亚甲基环阿尔廷醇、豆甾醇和达考甾醇。
Four compounds, namely 10 nonacosane, 24 methylenecycloartanol, stigmasterol and dacosterol have been isolated from the precipitate of the plant's methanol extract.
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