bi.o.as.tro.nau.ticsn.(used with a sing. verb)(名词)(与单数动词连用)The study of the biological and medical effects of space flight on living organisms.生物航天学:外层空间飞行对生物产生的生物学和医学上影响的研究【引伸】bi.oas.tronau.ticaladj.(形容词)