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。

youdao

Caterpillars eat the young leaves of this plant.

毛毛虫吃这种植物的嫩叶。

《牛津词典》

They feed on fruits and young leaves of bamboos.

它们以竹子的果实和嫩叶为食。

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The leaves make good salads when the plants are young, and the greens can be cooked when the plants are older.

VOA: special.2010.03.02

Some gardeners use leaf mulch fine particles of leaves instead of wood mulch around trees, especially young trees.

VOA: special.2009.06.30

Youth unemployment is especially high, and joblessness among the young leaves lasting scars.

ECONOMIST: Angst in the United States

They discovered that in as many as 62% of them, young leaves tend to be coloured anything from pale pink to deep red.

ECONOMIST: Young leaves, as well as old ones, are often coloured red

But in fact, young red leaves are equally common throughout a forest's layers.

ECONOMIST: Young leaves, as well as old ones, are often coloured red