OG SC 53

wxp33215 · 发表于 2015-9-10 11:46:37

53. The nineteenth-century chemist Humphry Davy presented the results of his early experiments in his "Essay on Heat and Light," a critique of all chemistry since Robert Boyle as well as a vision of a new chemistry that Davy hoped to found.

chemistry 是不可数名词前面为什么会有a 啊?
求教，求教~~

wxp33215 · 发表于 2015-9-10 11:58:29

og给的解释是 a vision of a new kind of chemistry ，难道kind of 可以省略？

[SC悬赏令] OG SC 53

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