这一切只不过是风中的微尘。
It is hypothesized that the primordial cloud of dust and gas from which all the planets are thought to have condensed had a composition somewhat similar to that of Jupiter.
据推测,所有行星都是由尘埃和气体组成的原始云团凝聚而成,其组成与木星的组成有些相似。
Chadwick: Clearly, there is a public health concern because of the fact that not all dust is derived from soil and therefore relatively benign.
查德威克:很明显,我们对公众健康问题有所担忧,因为事实上并不是所有尘土都来源于土壤从而相对无害。
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