氢气在工业上广泛用于制氨。Hydrogen is used extensively in industry for the production of ammonia.氢气是一种无色 、 无味的气体.Hydrogen is a corlourless, odourless gas.氢气对于气球来说是一种有用的气体, 它比空气轻.Hydrogen is a useful gas for balloons. It is lighter th...
Jral Anabrotic Lichen Planus and Fugitive Glossitis Treated With CO _ 2 Laser.CO_2激光治疗口腔糜烂型扁平苔癣和游走性舌炎.Clinical usage : for the treatment and prevention of cheilitis, glossitis, seborrheic dermatitis and conjunctivitis.防治...
根据犹太法律的规定,他在出生后8天内接受了割礼。He had been circumcised within eight days of birth as required by Jewish law.当今世界上,约有9,000万到1亿的女性接受过割礼。An estimated number of 90 to 100 million women around the world living today have been circum...