SSS 2009-03-17
时间：2019-01-08 作者：英语课 分类：Scientific American(三)月
This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute.
People get malaria 1 from Anopheles mosquitoes that themselves are infected with a protozoan parasite 2 called Plasmodium. The mosquitoes do have immune systems. But the parasite has figured out how to get past the mosquito’s defenses. So researchers at Johns Hopkins University Malaria Research Institute are trying to help people—by pumping up the mosquitoes’ immunity 3.
When a mosquito takes some blood from a human, she may also ingest Plasmodium. The parasite ends up in the insect’s gut 4. The mosquito immune system jumps into action as the parasites 5 try to push through the gut wall. Most parasites do get killed, but some manage to survive that gut migration 6. Then they replicate 7 and move to the salivary 8 glands 9, ready to infect the next person the mosquito bites.
Researchers are tinkering with specific mosquito genes 11 to see how they affect the development of the parasite. Their goal is to develop a genetically 12 modified mosquito with a strengthened immune system that kills all the parasites. They say next they’d need to get the gene 10 into enough wild mosquitoes that they would breed and pass that gene on. No simple effort. But if it works, it could be a big victory in the war against malaria.
Thanks for the minute for Scientific American's 60-Second Science. I'm Cynthia Graber.
- He had frequent attacks of malaria.他常患疟疾。
- Malaria is a kind of serious malady.疟疾是一种严重的疾病。
- The lazy man was a parasite on his family.那懒汉是家里的寄生虫。
- I don't want to be a parasite.I must earn my own way in life.我不想做寄生虫，我要自己养活自己。
- The law gives public schools immunity from taxation.法律免除公立学校的纳税义务。
- He claims diplomatic immunity to avoid being arrested.他要求外交豁免以便避免被捕。
- It is not always necessary to gut the fish prior to freezing.冷冻鱼之前并不总是需要先把内脏掏空。
- My immediate gut feeling was to refuse.我本能的直接反应是拒绝。
- These symptoms may be referable to virus infection rather than parasites. 这些症状也许是由病毒感染引起的，而与寄生虫无关。
- Kangaroos harbor a vast range of parasites. 袋鼠身上有各种各样的寄生虫。
- Swallows begin their migration south in autumn.燕子在秋季开始向南方迁移。
- He described the vernal migration of birds in detail.他详细地描述了鸟的春季移居。
- The DNA of chromatin must replicate before cell division.染色质DNA在细胞分裂之前必须复制。
- It is also easy to replicate,as the next subsection explains.就像下一个小节详细说明的那样，它还可以被轻易的复制。
- Small doses depress salivary and bronchial secretion and sweating. 小剂量可抑制唾液分泌、支气管分泌及出汗。
- The five pairs of salivary glands open into the mouth. 有五对唾液腺通向口腔。
- A single gene may have many effects.单一基因可能具有很多种效应。
- The targeting of gene therapy has been paid close attention.其中基因治疗的靶向性是值得密切关注的问题之一。
- You have good genes from your parents, so you should live a long time. 你从父母那儿获得优良的基因，所以能够活得很长。 来自《简明英汉词典》
- Differences will help to reveal the functions of the genes. 它们间的差异将会帮助我们揭开基因多种功能。 来自英汉非文学 - 生命科学 - 生物技术的世纪
- All the bees in the colony are genetically related. 同一群体的蜜蜂都有亲缘关系。
- Genetically modified foods have already arrived on American dinner tables. 经基因改造加工过的食物已端上了美国人的餐桌。 来自英汉非文学 - 生命科学 - 基因与食物