火药是希腊火的直接衍生物.Gunpowder was the lineal successor of the Greek fire.这类合成物是亚硝基羟胺衍生物.These compounds are nitrosohydroxylamine derivatives.很多环戊烷的衍生物在这个范围也出现吸收.Many cyclopentane derivatives also absorb in this region....
Asthma causes wheezing and breathlessness.哮喘会造成气喘和呼吸困难。There had been no indication of either breathlessness or any loss of mental faculties right until his death.他去世前并未出现呼吸困难或意识不清的迹象。Ralph's face was dark with brea...
一辆公交车从小径尽头的路上缓慢地隆隆驶过。A bus rumbled along the road at the top of the path.人们排成一列缓慢地依次走进房间，并坐了下来。Slowly, people filed into the room and sat down.它能使尼古丁平稳缓慢地渗透到血液里。It allows nicotine to diffuse slowly and steadily into the ...
当小镇的时钟敲响两点钟时，他们听到了隆隆的鼓声。As the town clock struck two, they heard the roll of drums.我们听见击鼓声.We heard the beat of a drum.但我万万没想到会有乐队指挥和击鼓声！What I didn't expect was a bandmaster and the bang of a drum!...
本文探讨医学专业教师多媒体制作课件问题.To explore how to make up multimedia courseware among medical professional teachers.方法: 在生物药剂学实验教学中采用多媒体课件辅助教学,并观察其效果.Methods: Use multimedia software as a supplementary means in experimentation teach...