The button can be filled with different aromatic substances to be made into a children's health care badge.
钮扣本体可充注各种芳香物质和制成儿童保健胸章。
This review introduces research progresses in citrus aromatic substances, their distilling, composition and identification.
介绍了柑橘果实皮和汁中芳香物质的提取、组成、鉴定等方面的研究进展情况。
The essential oil contains all kinds of the aromatic substances in Allium tuberosum Rottl. ex Spr. Determined by GC-MS-DS, 20 compounds in essential oil are mainly disulfides and trisulfides.
韭菜的香气成分全部集中于所含精油中，确定其主要成分为二硫和三硫化合物等20种物质。
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