这个组织同样对从这些源头释放出的颗粒污染水平进行了研究。它们由极小的固体和液体颗粒组成。
The group also studied particle pollution levels emitted from these sources, which are made up of a mix of tiny solid and liquid particles in the air.
这片台地是泉源,美就是从这个主要源头涌出来灌溉大地的。
This terrace was the well-head, the primal source whence beauty gushed out to water the earth.
这片台地是泉源,美就是从这个主要源头涌出来灌溉大地的。
This terrace was the well-head, the primal source whence beauty gushed out to water the earth.
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