Technically, this fragile chemical is not actually an oil (since it is water soluble), but it is what gives the coffee its flavor and aroma.

从学术上来讲，这种微妙的化学物质并不是真正的油脂(因为它可以溶于水)，但它确实是咖啡的芬芳之源。

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The First Step (Degreasing) of the procedure is designed to remove dirt, dust, oil and grease. A water-soluble detergent is used to accomplish this, or a solvent.

第一步（去油）：去除污垢、灰尘、油和脂。使用水溶性去污剂或溶剂来完成该步骤。

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Main ingredients: Deep sea mineral water, ha, aloe essence, hamamelis, chamomile essence and water-soluble castor oil.

主要成份：深海矿物水、透明质酸、芦荟萃取精华、金缕梅、甘菊精华、水溶性蓖麻油。

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The fascinating part about this layer is that it solves the problem for phospholipids about how to exist in water when half of you wants to be in oil, and that the water soluble part of the top leaflet here, of the top points up into the water, and the fatty acid chains point down.

这层膜的迷人之处在于,它解决了磷脂,如何存在于水中和油脂中的问题,水溶性的顶端部分,向上插入水中,而脂肪链则指向下

耶鲁公开课 - 生物医学工程探索课程节选