AI:The country that is currently best positioned to make a transition from air travel to sustainable train infrastructure with the least amount of disruption would likely be one that already has a well-established and extensive high-speed rail network, along with supportive infrastructure and a cult...
Cystic fibrosis is caused by defects in a gene called CFTR, which plays a part in the transport of chloride ions(离子) out of the cells lining the lungs, airways and gut. Defects in this gene mean that patients have difficulty expelling mucus(黏液) and inhaled (吸入) microorganisms from th...
Avoid dancing, swim- ming and all violent exercises, sewlng on sew- ing machine should be restricted 'Fainting in the early months is often caused from bad air in overcrowded and overheated rooms, also from an empty stomach when the woman is too busy to notice nature's call for -nourish...
Few undertakings in life require the willpower of mountaineering. You may be freezing, your legs noodles, burning, nearly useless, your lungs seared by bellows-like breathing at altitude. You don’t think you can go one more step, but you keep going because you can see the summit, it’s...