文章列表

• 1.【英语时差8,16】为什么有的车头灯是蓝色的？（下）
• This is because the shorter the wavelengths of light, the better it scatters off of air and water particles. Blue Light So blue light, which has very ...
• 2.【英语时差8,16】为什么有的车头灯是蓝色的？（上）
• Have you ever been driving along a country road at night, and all of a sudden a car comes around the bend and shines their high beams right into your ...
• 3.【英语时差8,16】怎样清洁大脑（下）
• Scientists think it has to do with inflammation. Researchers are still trying to figure out exactly how this might work. But scientists know that gum ...
• 4.【英语时差8,16】怎样清洁大脑（上）
• Studies suggest that gum disease, especially, can affect the brain. Some studies have found that older people with gum disease are more likely to have...
• 5.【英语时差8,16】光速与星际高速路（下）
• Likewise, light travels at its maximum speed through a vacuum-the interstellar highway-but it slows down when it enters air, water, or some other medi...
• 6.【英语时差8,16】光速与星际高速路（上）
• If youre driving on an interstate highway, the only thing keeping you from going faster than the speed limit is your sense of civic duty, or perhaps t...
• 7.【英语时差8,16】猴妈妈的爱（下）
• The researchers observed macaque moms gently bouncing their young, holding their heads and trying to attract their gaze. And when the monkey moms made...
• 8.【英语时差8,16】怎样能让宝宝睡着？（下）
• Three of these nucleotides are also thought to be associated with sleep and sedation. A team of Spanish researchers collected breast milk over a twent...
• 9.【英语时差8,16】怎样能让宝宝睡着？（上）
• Parents of young infants know just how rare and valuable uninterrupted sleep can be. As it turns out, the timing of breast milk production may help pl...
• 10.【英语时差8,16】为什么一天有24小时？（下）
• If you drop the ball, gravity will pull it toward the center of the earth, but will not diminish that extra eastward speed. So as the ball falls itll ...