Corn is a prime source of feed for dairy cattle and the rising costs could force farmers to reduce their herds, leading in turn to reduced supplies.

玉米是乳用牛饲料的主要来源，价格上涨将迫使农民减少饲养牲口数，进而导致供给减少。

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Corn is a prime source of feed for dairy cattle and the rising costs could force farmers to reduce their herds, leading in turn to reduced supplies and modest price increases.

玉米是乳品牲口饲料的主要来源。价格上涨将迫使酪农减少饲养牲口数，导致供给减少，价格略增。

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Cloudkick offers tools to manage virtual machines. It is the force behind libcloud, an open-source project that facilitates the development of services spanning different clouds.

Cloudkick公司提供工作来管理虚拟机，开源工程在libcloud组织背后促进各不相同的云开发服务。

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Gravity is one force that acts on a body without the source of the force actually touching it.

引力是一种受力物体收到了力的作用,但却没有接触施力物体的力

耶鲁公开课 - 基础物理课程节选

Slightly more than half of the work force is in agriculture, but services are the major source of economic growth, accounting for more than half of India's output, with only one-third of its labor force.

FORBES: India

The force helicopter was scrambled to find the source of the beam.

BBC: Green laser

Younger and more heavily represented in the labor force, minorities are poised to become the primary source of entrepreneurial growth.

FORBES: The Best Cities For Minority Entrepreneurs