He was not a prepossessing sight.他长相不怎么样。Clean clothes and good manners are prepossessing.清洁的衣服和良好的举止能给人以好感.He / His appearance is not at all prepossessing.他[他的外表]毫无吸引力....
可以实验测定氘的结合能.The binding energy of the deuteron can be found experimentally.更为活跃的是氢的较重同位素, 氘和氚.More reactive are the heavier isotopes of hydrogen, deuterium and tritium.对于单晶,氘化的这种优点并不是必不可少的.This advisability of deuteratio...
An irradiation of 60 sec. limits the build - up of excessive gamma radiation levels.采取60秒辐射限定了剩余伽玛射线水平的增高.However the major portion of the initial gamma radiation is derived from the two latter sources.可是绝大部分早期γ辐射来自后两种来源...