人工系统 man made system; man-made system; manual system 双工系统 duplex machine system; duplex system; duplexed systems; system, duplex .
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The Mississippi River system and the Great Lakes are connected only through the man-made Chicago Sanitary and Ship Canal, which leads from Lake Michigan to the Illinois River.
密西西比河流域与五大湖之间唯一的纽带是人工挖掘的芝加哥环境卫生和航行运河，它连接于密歇根湖与伊利诺斯河之间。
And not just man. The whole Earth was made from dust particles in orbit around the primitive sun, as were all the other solid objects in the solar system.
而且不仅仅人是尘土造的，包括地球在内的、整个太阳系的固体物质都是由环绕早期太阳的尘埃造的。
Traditionally mariculture, involving the use of a system of man-made ponds in rearing specific Marine or brackish-water animals, has been practised in Indonesia for hundreds of years.
传统的海水养殖在印度尼西亚有几百年的历史。它包括在人工池塘中养殖专门的海水或半咸水动物。
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