这种植物的茎上长有绿色细长条纹。
The plant's stem is marked with thin green longitudinal stripes.
当茎死亡时，它的激素信号也停止了。
博洛格研究的小麦品种有又高又细的茎。
Wheat varieties that Borlaug worked with had tall, thin stalks.
它的长茎盘在三角墙上，墙上挂着一个小钟。
The long stems twined round the gable, on which there hung a small bell.
风儿吹抚着它们的茎，渴了的根将雨水一饮而尽。
The wind blew through their stems and the rain was gulped thirstily by their roots.
草是被子植物的简单形态，种子被包裹在长茎上。
Grasses are simple forms of angiosperms that bear their encapsulated seeds on long stalks.
茎帮助支撑根。
相比之下，大型斑马依靠大量的低质量茎材料为生。
By contrast, the large zebra lives on the masses of low-quality stem material.
有毒的矿物质首先被根部吸收，然后转移到茎和叶上。
Toxic minerals would first be absorbed by roots but later relocated to the stem and leaves.
那家伙把一截木桩拉到我餐桌旁边，看着我咀嚼腌制的木茎。
The guy pulled a stump of wood up next to me at the table and watched me chew through the sautéed woody stems.
她发现茎条顶上开出了18朵白色的小花，闻起来“很香”。
She discovered that the stems had grown 18 white tiny flowers on top and smelled "fragrant".
一旦开始生长，这些植物似乎就不再具有暂停其茎叶新陈代谢的能力。
Once they start growing, such plants seem not to retain the ability to hit the pause button on metabolism in their stems or leaves.
那么这些细胞是如何分化并形成像根、茎、叶和果实那样不同的结构的呢？
How then can these cells differentiate and form structures as different as roots, stems, leaves, and fruits?
在室内种植足够的蕨菜是很困难的，而且这些蛾子不容易利用割下的茎秆。
Growing enough bracken indoors is difficult, and the moths do not readily exploit cut stems.
它会先迁移到未开发的地区，吃掉大量的低质量的茎秆，然后再继续迁移。
It migrates first to unexploited areas and chomps the abundant low-quality stems before moving on.
然而，一旦它们开始生长，这些植物似乎就无法阻止其茎或叶的新陈代谢的能力。
Yet once they start growing, such plants seem not to retain the ability to hit the pause button on metabolism in their stems or leaves.
普罗米修斯从战车上点燃一支火把，把火放在一根空心的茎里，藏在他的斗篷里。
Prometheus lit a torch from the chariot and put the fire in a hollow stalk that he concealed under his cloak.
这种昆虫，也被称为番茄潜叶蛾，以果实为食，还会钻入植株的茎内移动来破坏农作物。
The insect, also known as the tomato leaf miner, devastates crops by feeding on fruits and digging into and moving through stalks.
当地的农民对小麦计划怀有敌意，因为1939年至1941年间小麦由于茎锈病而严重减产。
Native farmers were hostile towards the wheat programme because of serious crop losses from 1939 to 1941 due to stem rust.
把马齿苋想成是生菜的一个伟大的替代品：叶和茎是脆的、耐嚼、多汁，而且它们有淡淡的柠檬味。
Think of purslane as a great alternative to lettuce: the leaves and stems are crisp, chewy, succulent, and they have a mild lemony taste.
例如，维纳斯捕蝇草和葡萄牙茅膏菜有共同的祖先，后者只通过茎上的“捕蝇纸”腺体被动地捕捉猎物。
Venus flytraps, for example, share an ancestor with Portuguese sundews, which only catch prey passively, via "flypaper" glands on their stems.
对此的解释是，每一棵白杨，虽然看起来是独立存在的一棵树，但实际上只是一个巨型有机体的茎或芽。
The explanation is that each aspen while appearing to exist separately as a single tree, is in fact only the stem or shoot of a far larger organism.
此前研究人员曾报告称，虽然植物没有大脑，但它们的茎和叶发出的电信号还是触发了类似于意识的反应。
Though plants lack brains, the firing of electrical signals in their stems and leaves nonetheless triggered responses that hinted at consciousness, researchers previously reported.
植物的不同部位具有不同的食用价值：靠下面的部位是营养、多汁的叶子；上面更高的部位则是更为坚硬的茎杆。
The different vegetational parts differ in their food qualities: lower down, there are succulent, nutritious leaves; higher up are the harder stems.
植物的祖先是进行光合作用的单细胞生物，由此产生的植物可能缺乏真正的根、茎、叶和复杂的生殖结构，如花朵。
The ancestors of plants were photosynthetic single-celled organisms that gave rise to plants presumably lacked true roots, stems, leaves, and complex reproductive structures such as flowers.
它们的种子的顶端向上生长，其距离地面的高度刚好可以接触到风；它们的体型大小也刚好是生长所需的尺寸；它们的茎是空心的，且仅仅是通过体内的含水量来保持自身的坚挺。
Their seed heads raised just high enough above the ground to catch the wind, the plants are no bigger than they need be, their stems are hollow, and all the rigidity comes from their water content.
茎不向上生长，根也不向下生长。
The stems weren't growing upward and the roots weren't growing downward.
当光照充足时，植物的茎向上生长，根向下生长。
When the plants had more light, the stems turned up and the roots went down.
在地球上，重力有助于植物的茎“向上”生长，根“向下”生长。
On Earth, gravity helps a plant's stems and roots to find "up" and "down".
例如，烟草植物在缺水时发出的“尖叫”要比它们的茎被切断时更强烈。
For example, the tobacco plants gave out a stronger "scream" when they were deprived of water than when their stems were cut.
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