1.This oily substance protects the airways, but too much of it blocks them.
这种油状物质虽然可以保护呼吸道，但多了会阻塞呼吸道。
2.And they often produce more mucus than normal. This oily substance protects the airways, but too much of it blocks them.
他们比正常人分泌更多的可以保护呼吸道的油状液体，但多了并不见得更好，因为这样会阻塞人的呼吸道。
3.Raw wool that has not been cleansed of this oily substance.
生羊毛：没有脱去油性物质的羊毛。
4.any of various beetles that exude an oily substance from the leg joints that deters enemies.
当威吓敌方时会从腿的关节处渗出一种油状物质的各种甲虫。
5.Never use butter or other fatty or oily substance on a burn.
不要将黄油或其他含脂肪和油脂的东西涂于患处。
6.This is evident in the recent [Papua New Guinea] oily substance found following a volcanic eruption, which man had no explanation for!
在最近巴布亚新几内亚的火山爆发后，就有石油类物质被发现，人类对此无从解释！从而该粘合过程得到了清楚的证明。