More reactive are the heavier isotopes of hydrogen, deuterium and tritium.更为活跃的是氢的较重同位素, 氘和氚.Deuterium is widely used in the study of reaction mechanisms and in spectroscopic studies.氘广泛地应用于反应机理的研究和光谱分析.The substituent i...
He was in the studio tearfully erasing all the tapes he'd slaved over.他在录音棚里流着眼泪抹掉他辛苦录制的所有磁带。Suddenly, fear overtook longing, erasing memories.突然, 恐惧淹没了渴望, 泯灭了回忆.Spot Lifter is ideal for erasing skin flaws such as m...