牛顿和他的同事们相信促使金属在烧瓶中生长是有可能的，毕竟，众所周知，许多化学反应最后会剩下的树枝状的残渣。

Newton and his peers believed it was possible to prompt metals to grow, or “vegetate,” in a flask. After all, many chemical reactions were known to leave lovely dendritic residues in their wake.

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图为污水池里的油砂残渣，其中混有沙子、污水以及萃取未精炼的石油产品后所残留的有毒化学物质。

A containment pond holds tar sands tailings, consisting of a mixture of sand, water, and toxic chemicals that remain after the unrefined oil products have been extracted.

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女性比男性产生更少的唾液，减少了对附在牙齿上的残渣的清除率，同时在怀孕时唾液的化学结构发生变化，减少了唾液的抗菌能力。

Women produce less saliva than do men, reducing the removal of food residue from the teeth, and that during pregnancies the chemical composition changes, reducing saliva's antimicrobial capacity.

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