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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Multiple historical documents confirm that Japan had established sovereignty over Takeshima at least by the mid-17th century.

ECONOMIST: Letters

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