烯空气跟空气十分近似.Olefin gas closely approximates air.所有的主要难点都涌现在烯酮 ( 1 ) 的合成中.All the chief difficulties crop up in the synthesis of the enone ( 1 ).某碳氢化合物已知可能是烯烃或是烷烃.A hydrocarbon was known to be either an alkene or alkane....
We now see paradigms and paradigm overthrows everywhere, inside of science and out.我们现在可以随处看到典范和推翻典范的事例, 无论在科学还是其他方面.And if old tried - and - true paradigms really aren't working, what does work?而如果旧的试错样式真的已经过时, 什么有...
He is on a trek through the South Gobi desert.他正徒步穿越南戈壁沙漠。He had prospected for minerals everywhere from the Gobi Desert to the Transvaal.他已在从戈壁沙漠到德兰士瓦的无数地方勘探过矿藏。He had prospected for minerals everywhere from the Gobi De...
纵隔积气可能引起腔静脉梗阻.Pneumomediastinum may cause caval obstruction.纵隔淋巴结通常充血和增长.Mediastinal lymph nodes were usually hyperemic and enlarged.颈部淋巴结, 纵隔淋巴结和肠余膜淋巴结极度增大, 水肿,罕见性充血.The cervical, mediastinal, and mesenteric lymph nodes...
Removal of excess heat is accomplished by means of a radiator.通过散热器完成多余热量的排出。Smoke was used to simulate steam coming from a smashed radiator...用烟来模拟从撞碎的散热器中冒出的蒸气。A household radiator absorbs energy in the form of electri...