So can the movement of aphids when, having depleted the young leaves on one food plant, their offspring then fly onward to a different host plant, with no one aphid ever returning to where it started.

蚜虫的运动也是如此，当吃完一株食用植物的幼叶，它们的后代会飞到另一株宿主植物上，没有蚜虫会再回到最初的地方。

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They studied the sun's movement and also paid attention to other natural changes such as air temperature, water and plant growth.

他们研究了太阳的运动，还关注了其他自然变化，如气温、水和植物生长。

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Study on laws of wind-blown sand movement and plant function mechanism is an important part of desert research.

风沙运动规律以及对植物作用机理的研究是沙漠学探究的重要组成部分。

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Its Animal and Plant Health Inspection Service had long regulated the importation and interstate movement of plants and plant products that are pests, which were defined by means of an inclusive list.

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Environmentalists are blocking everything from a new cement plant in North Carolina to the movement of mining equipment along rural roads in Montana, often with the most tenuous of rationales.

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