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Leaf base often narrowed into a petiole, spurless.

基部通常缩小成为,无距。

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Trema polygama, described from Yunnan, differs in having the inflorescences shorter than the adjacent petioles.

发表自云南,于花序短于临近的

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The development of xylem is of mesarch.Stomata are monocyclic type.

脉、、上胚轴的维管束均为外韧

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Leaves alternate, shortly petiolate, leathery, margin entire, venation pinnate or palmately triplinerved.

生,具短,革质,边缘全缘,羽状脉或者掌状离基三出脉的。

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Characteristics: Terrestrial ferns; stipes tuft, backlish at base; young fronds pinnaye with wider pinnae, when getting older, the fronds become bipinnate or tripinnatifid with slender pinnules.

地生,丛生,基部黑色;较年轻的子一回羽状复,较老的子二回或三回羽状复

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英国学生科学读本

Near its top the flower-stalk bends over, so that the single white flower at its end hangs downwards.

叶柄从靠近顶部位置开始弯曲,因此,每一株雪花呈现出低头思索样子。

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世界小史

Many of them settled above the maple leaf, to the north of its stalk, on a peninsula called Attica.

他们中许多人在枫树叶上方,即在叶柄北方定居下来,那儿就是阿提喀半岛。

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还乡

It was the united products of infinitesimal vegetable causes, and these were neither stems, leaves, fruit, blades, prickles, lichen, nor moss.

它是细小植物共同合成结果,这些植物不是树干草茎,叶柄叶片,也不是果实棘刺,青苔绿薛。

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选修核心短语句型+作文范文

I touched them gently on their leaves, and they closed up along the petiole.

我轻轻地触碰它们叶子,它们就沿着叶柄闭合起来。

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夏日走过山间

We should boil lupine leaves, clover, starchy petioles, and saxifrage rootstocks like the Indians.

我们应该像印第安人一样煮羽扇豆叶、三叶草、含淀粉叶柄和虎耳草砧木。

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2.童年

When I was young, we used to play a fun game called " leaf stem fight" a lot in the fall.

我小时候,我们在秋天经常一个好戏叫“拔根”。✎ 拔根这个戏没有官方翻译,leaf stem fight是小雅团队翻译。叶子根部,也就是叶柄,口语中叫stem,植物学上叫petiole。

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物种起源

A pollinium, when highly developed, consists of a mass of pollen-grains, affixed to an elastic foot-stalk or caudicle, and this to a little mass of extremely viscid matter.

高度发育花粉由大量花粉粒组成, 附着在有弹性足柄或叶柄上, 而这又是一小团极其粘稠物质。

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物种起源

That this is the origin of the caudicle, even when of considerable length and highly developed, we have good evidence in the aborted pollen-grains which can sometimes be detected embedded within the central and solid parts.

这就是叶柄起源, 即使在叶柄相当长且高度发达情况下,我们在花粉粒败育中也有很好证据, 有时可以检测到花粉粒嵌在中央和实心部分中。

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加州群山(上)

In still nights the grass panicles and every leaf and stalk are laden with frost crystals, through which the morning sunbeams sift in ravishing splendor, transforming each to a precious diamond radiating the colors of the rainbow.

寂静夜晚,草穗、叶柄结满了霜晶,清晨阳光透过霜晶,散发出迷人光彩,每一颗变成了闪耀着彩虹般色彩珍贵钻石。

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