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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The low-energy bulbs emit a warm luminous glow that supports the photosynthesis process of the accompanying plant, creating a direct relationship between the lamp and host plant.

这种低能耗的灯泡散发出一束温暖明亮的光线，使得与之相伴的花儿能正常的进行光合作用，这样小灯与它的寄居植物就形成了一种直接有效的关系。

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Rhizobia establish a symbiotic relationship with their host plant ― exchanging nitrogen for nutrients ― by forming nodules, which penetrate the roots and sometimes stems of the plant.

根瘤菌通过形成根瘤和它们的宿主建立了一种共生关系——用氮换取营养。 根瘤通常会渗透进植物的根，有时候还会渗透进植物的茎。

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As host of this year's World Jatropha Summit, the government in Accra is seeking greater investment in the hardy plant whose seeds can be crushed into an oil that is processed into high-quality biodiesel.

VOA: standard.2009.08.23

But new research found that, like stem rust, stripe rust increases its genetic variability by reproducing sexually on the leaves of another host plant (the barberry), making itself more adaptable and more deadly.

ECONOMIST: Wheat rust and world farming

The degree of regulation should be proportionate to the perceived risk of the new organism, which is a function of certain characteristics of the host plant, such as weediness, toxicity, ability to outcross, etc.

FORBES: EPA Biotech Regulation Bucks The Scientific Consensus

The degree of oversight should be proportionate to the perceived risk of the genetically engineered plant, which is a function of certain characteristics of the host plant (weediness, toxicity, ability to outcross, etc.) and the introduced gene.

FORBES: Back To The Future: Let's Reverse 25 Years Of Flawed Agbiotech Regulation