他用右手抓住了一块凸起的岩石。He grabbed at a protrusion of rock with his right hand.裂缝、凸起、剥落的勾缝和湿斑都意味着存在问题。Cracks, bulges, crumbling pointing and damp patches mean trouble.海伦的双手枯瘦，青筋凸起。Helen's hands were thin and veined....
碳的诸多同位素the many isotopes of carbon氚是最和缓的放射性同位素之一.Tritium is one of the mildest radioactive isotopes.激光可以改变这种局面,从而使同位素分离变得比较容易 、 比较廉价一些.Lasers promise to change this by making isotope separation easier, and cheaper....
I prophesy that he'll be back in the old job.我预言他将重操旧业.Monks and nuns who prophesy are not of that rareness.说预言的修士和修女,很少有这个祥子的.We cannot prophesy what may happen.我们无法预言会发生什么....