She climbed on her bike with a feeling of pride and pedalled the five miles home...她自豪地骑上自行车,蹬了5英里路回家。He pedalled furiously up the hill.他猛踩踏板向山上骑去.Allen back-pedalled, saying that he had had no intention of offending the...
The collapsar model of gamma - ray bursts.γ射线爆发的黑洞模型.If gamma particles are present, potential differences of several thousand volts can be generated.如果存在γ粒子, 可能产生几千伏的电位差.Unimmunized contacts, especially infants, should ...