横神经通往同体节的气门.The transverse nerves pass to the spiracles of their segment.腹面昆虫的腹部体节.The abdominal segment of an insect.脊椎动物的脊柱来源于体节,体节是胚胎发生过程中的过渡性结构.The vertebral column is derived from somites, which are mesoderm that ar...
Seed the cherries before you put them in the pie.樱桃去籽之后才能做馅饼.Cherries vary in colour from almost black to yellow.樱桃的颜色由近乎黑到黄各不相同.The cherries are quite ripe.樱桃熟透了....
他是怎样在成为外交大臣以后的17年间保住最高职位的？How does he stay on top, 17 years after becoming foreign minister?6个月以后的事情我就无法预见了。I can't see any farther than the next six months.昨天的会议是为以后的工作做准备。Yesterday's meeting was to lay the gr...
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....