Clothing which is fire - resistant in air maybe readily ignitable in oxygen - enriched atmospheres .在空气中防火的衣服在 富氧 大气中可能很容易着火.The atmospheres of Mars and the Earth are very different.火星与地球的大气层是很不相同的.It's quite import...
a two-year diploma course二年制的文凭课程The course leads to a diploma in psychiatric nursing.读完这门课程可以获得精神病护理文凭.She worked hard to earn her music diploma.她刻苦用功,以求获得音乐学位证书....