来势汹汹的野火控制使得加利福尼亚的森林拥挤不堪，小树与大树争夺资源。

Aggressive wildfire control has left California forests crowded with small trees that compete with big trees for resources.

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通过与啮齿动物争夺种子，黑蚂蚁有助于控制啮齿动物的数量，这些啮齿动物会对公众健康构成威胁。

By competing with rodents for seeds, black ants help control rodent populations that pose a public health risk.

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在闷热潮湿的天气里运动能力下降的一个原因是，运动中的肌肉必须与皮肤争夺血液。

One reason performance declines on sultry, humid days is that working muscles have to compete with the skin for blood.

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The Carthaginians, in fact, and the Greeks will have to fight the Carthaginians over the years for control of the island of Sicily.

实际上,迦太基人,而在接下来的历史里,为了争夺西西里岛,古希腊人与他们进行了长年的战争

耶鲁公开课 - 古希腊历史简介课程节选