单词：microscopic dust particles
单词：microscopic dust particles 相关文章
From VOA Learning English, this is the Health Lifestyle report. From Asia to Europe to North America, poor air quality is making people sick and, in some cases, killing them at an early age. Air pollution causes six million premature deaths every yea
2017年VOA慢速英语(四)月
[00:07.21]NASA's Stardust spacecraft has successfully deployed a device that will collect extremely small particles in space. [00:16.95]The particles are called dust. [00:19.72]They form a stream of particles that flows through our solar system. [00:
美国英语听力80篇
If you wipe a finger across a household surface that hasnt been cleaned in the last few days, chances are youll come into contact with dust. Look around and youll find the stuff everywhere, from the particles floating in a sunbeam to the fine layer o
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At first glance, dust storms do not seem very fascinating. Winds pick up fine particles from the ground, and then the air becomes thick with dust. What is interesting, though, is that dust storms can travel across the ocean, sometimes from continent
双语有声阅读
Juice Infused with Microscopic Particles Offers 'Unparalleled' View of Gut A new imaging technique involving a specially-prepared liquid that patients drink could help doctors better diagnose and eventually treat illnesses in the gut. The small intes
VOA标准英语2014年(七月)
Once stimulated, these muscles go to work and cause us to forcefully expel air from the mouth and nose. Or, in other words, we sneeze. Because the nose lining tends to swell when we lie down, making it even more sensitive to sneeze-causing particles,
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