英文书摘精选 为什么昆虫的血是绿色的或是黄色的?
时间：2018-12-28 作者：英语课 分类：初学者听力文摘精选
Why Is Insect Blood Green Or Yellow?为什么昆虫的血是绿色的或是黄色的?
You’ve probably heard someone use the phrase “blood red,” but have you ever wondered if all blood really is red? For example, think about the bugs 2 you’ve seen splatter against your car’s windshield, leaving behind a clear, yellowish, or greenish liquid. That liquid, is hemolymph, or insect blood.
你可能听到有些人这样说“血红色”，但是你是否想过是不是所有的血都是红色的？举个例子，想一想你所见过的臭虫撞到你汽车的挡风玻璃上时，留下一滩清楚的，黄色或是绿色的液体。这种液体是昆虫的淋巴液，或许是昆虫的血
Insect Blood
昆虫的血液
The blood of an insect functions differently than the blood of a human. In humans, blood gets its red color from hemoglobin, which travels through blood vessels 3 carrying oxygen from the lungs to the rest of the body. Insect blood, however, does not carry gasses and has no hemoglobin. Instead, bugs have a system of tubes that transport gasses directly between their cells and the outside air.
昆虫血和人类的血在功能上大不相同。对人类来说，血液之所以呈现红色是因为有血红蛋白，血红蛋白通过血管从肺部向全身各处运输氧气。而对于昆虫来说，血液既不会运输任何气体，也没有血红蛋白，相反地，昆虫的身体中有一个管路系统，可以直接在细胞核外界空气中进行气体运输
In fact, insects don’t even have blood vessels. Instead there is a hollow space inside their external skeleton in which their blood oozes 4 around. This cavity extends to the antennas 5, legs, and wing veins 6. The bug 1’s heart, a long tube that stretches the length of its body, pushes the blood from the rear end of the insect on forward. The bug may also have little hearts at the ends of its extremities 7 to help move the blood along.
事实上，昆虫甚至没有血管，取而代之的是外骨架内部的空洞，血液可以在周围渗出。这种腔体结构延伸至触角，腿和翅膀。昆虫的心脏，一条绵延整个身体的长管子，将血液从身体的末端推到前面。昆虫在四肢处也可能有少许心脏来帮助血液流动。
Pigment 8
色素
Pumping blood is a slow process: it takes about eight minutes for an insect’s blood to circulate completely. Like human blood, bug blood carries nutrients 9 and hormones 10 to the insect’s cells. The greenish or yellowish color of insect blood comes from the pigments 11 of the plants the bug eats.
泵血是一个缓慢的过程：昆虫全身血液完全循环一次大约需要八分钟。类似于人类血液，昆虫血液运载营养和激素到昆虫细胞中。昆虫血液中的绿色或者黄色来自于昆虫吃的植物的色素。
- There is a bug in the system.系统出了故障。
- The bird caught a bug on the fly.那鸟在飞行中捉住了一只昆虫。
- All programs have bugs and need endless refinement. 所有的程序都有漏洞，都需要不断改进。 来自《简明英汉词典》
- The sacks of rice were swarming with bugs. 一袋袋的米里长满了虫子。 来自《简明英汉词典》
- The river is navigable by vessels of up to 90 tons. 90 吨以下的船只可以从这条河通过。 来自《简明英汉词典》
- All modern vessels of any size are fitted with radar installations. 所有现代化船只都有雷达装置。 来自《现代汉英综合大词典》
- The spring oozes out of a rock. 泉水从岩石中渗出。 来自《现代汉英综合大词典》
- Blood oozes from a wound. 血从伤口渗出。 来自《现代英汉综合大词典》
- Marconi tied several antennas to kites. 马可尼在风筝上系了几根天线。 来自超越目标英语 第3册
- Radio astronomy today is armed with the largest antennas in the world. 射电天文学拥有世界上最大的天线。
- The blood flows from the capillaries back into the veins. 血从毛细血管流回静脉。 来自《简明英汉词典》
- I felt a pleasant glow in all my veins from the wine. 喝过酒后我浑身的血都热烘烘的，感到很舒服。 来自《简明英汉词典》
- She was most noticeable, I thought, in respect of her extremities. 我觉得她那副穷极可怜的样子实在太惹人注目。 来自辞典例句
- Winters may be quite cool at the northwestern extremities. 西北边区的冬天也可能会相当凉。 来自辞典例句
- The Romans used natural pigments on their fabrics and walls.古罗马人在织物和墙壁上使用天然颜料。
- Who thought he might know what the skin pigment phenomenon meant.他自认为可能知道皮肤色素出现这种现象到底是怎么回事。