The half - life of francium is 22 minutes.钫的半衰期是22分钟.Francium is the densest of the Alkali Metals and also radioactive.钫是碱金属中密度最大的,具有放射性.Even Francium's most stable isotope, Francium - 223 only has a half - life of ...
Students all over the country are facing an uncertain future.全国各地学生前途未卜。She has danced, choreographed, lectured and taught all over the world.她在世界各地跳过舞、编过舞、讲过学、也教过书。When I look over and see Terry I tingle all over.当我放眼望去...
It is simpler and quicker to use than conventional methods.这比通常的做法更简单、更快捷。Make the extra effort to impress the buyer and you will be rewarded with a quicker sale.多用心去打动顾客，货物就会更快售出。"There are trains straight from Cambridg...
Objective : To explore the treatment of pure red cell aplasia ( PRCA ) after ABO - incompatible alloge - neic peripheral blood stem cell transplantation.目的: 探讨ABO血型不合异基因外周血干细胞移植后纯红细胞再生障碍性贫血 ( PRCA ) 的治疗.Programmers like ...
研究了共振隧穿结的THz开关特性.THz switch based on the double barrier RTS is studied.那不可能. 对撞机可是在地下隧道里呢.Ann : That's impossible. The LHC lies in an underground tunnel.用双势垒模型研究了半导体异质结量子阱的隧穿特性.The tunneling characteristics of the s...
I want to quit this shanty.我也要离开这烂房子.a shanty town贫民窟She looked doubtfully at him, at the low shanty.她犹豫不定地看着他, 看着那间矮棚屋.Pop music can be heard 10 miles away blasting out from the huge tented shanty-town.响亮的流行音乐从10英里之外巨大的...
冷空气吹得大街上的格栅呜呜作响。Cool air whooshes up through the grates on the street.木柴在炉栅中燃烧着。A wood fire burned in the grate.那只狗一跳就越过了栅门.The dog jumped over the gate in one bound....