世间万物的存在，必定有其存在的价值和意义，每一个事物的产生必定有其产生的根源，并非凭空而降。

Arsenic 砷

在古代，炼金家们用毒蛇作为代表砷的符号。砷的英语名称“Arsenic” 一词来源于阿拉伯语“Azzernikh”，意指砷的矿石——石黄，该矿石的拉丁文名称是 auriPigmentum，意为“金色的染料”，英语中的 Orpiment（雌黄）一词就是由这个字转化来的。

The term arsenic was originally applied to the lemon-yellow mineral arsenic trisulphide, and its history reveals the reason: for its appears to be based ultimately on Persian zar ‘gold’ (related forms include Sanskrit hari ‘yellowish’, Greek khlōros ‘greenish-yellow’, and English yellow itself). The derivative zarnīk was borrowed into Arabic as zernīkh, which, as usual with Arabic words, was perceived by foreign listeners as constituting an indivisible unit with its definite article al ‘the’ – hence azzernīkh, literally ‘the arsenic trisulphide’. This was borrowed into Greek, where the substance’s supposed beneficial effects on virility led, through association with Greek árrēn ‘male, virile’, to the new forms arrenikón and arsenikón, source of Latin arsenicum and, through Old French, of English arsenic. The original English application was still to arsenic trisulphide (orpiment was its other current name), and it is not until the early 17th century that we find the term used for white arsenic or arsenic trioxide. The element arsenic itself was isolated and so named at the start of the 19th century.