Until the mid-17th century, maths had been required to handle only discrete variables.

直到17世纪中期，数学只能处理离散变量。

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In the mid-17th century, the German chemist Glauber obtained permanganate, the first usable manganese salt.

17世纪中期，德国化学家格劳·贝尔研究得出了第一种锰酸盐- - - - -高锰酸。

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Its final end came in the mid-17th century, at the outset of a bloody civil war, when authorities ordered the walls pulled down.

剧院一直持续到17世纪中叶，随着内战的爆发，官方命令拆除围墙。

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In the mid-17th century, English law ruled that any European wines shipped to the colonies had to go via British ports.

WSJ: Will Lyons on Wine: Have Some Madeira, M��Dear

Invented by a Dutch doctor, Franciscus de la Boe, in the mid-17th century, gin (originally called genever) was made by redistilling pure malt spirits with juniper berries.

FORBES: When gin was in

It maybe a little more than 20 years since the end of apartheid opened up the wine industry to the wider world but vines have been tended in this corner of the globe since the mid-17th century.

WSJ: Will Lyons on Wine: Wonders of the Western Cape