flocks » (名) 羊群; 人群, 群众; 群; 信徒, 会众#一簇羊毛; 棉絮; 毛屑; 柔细材料 (动) 聚集; 成群地去; 用毛屑填塞 three differen comets followed the same orbit. » 三个不同彗星遵循同一轨道。
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窗户几乎是不透明的，上面有层像是泛白的绒毛或毛屑。
The windows were nearly opaque, with a scrim of some sort of pale fluff or dander.
特别是，他们对猫毛屑过敏的几率是2个月大未被动吸烟儿童的两倍。
In particular, their odds of being sensitized to cat dander were double that of children with no secondhand smoke exposure at 2 months of age.
一种观点认为，过敏之所以会产生，是由于人们在童年时期当免疫系统尚未成熟时曝露于某些刺激物之下，如灰尘或动物毛屑。
One view is that allergies can develop as the result of childhood exposure to certain irritants, such as dust or animal dander, while the immune system is not yet mature.
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