在久远的过去，岩石板滑落到周边，从而形成了这个洞。Slabs of rock had slipped sideways in the remote past, and formed this hole.他对于他那久远的弗吉尼亚的家谱很引以自豪.He was very proud of his old Virginian ancestry.在车轮轧轧的节奏声中,他想起了意莱莎为一些久远的事发出的笑声.Above the rhythm of...
例如出生人口性别比偏高、人口老龄化等.These problems include the high sex ratio and the growing population aging.使中国人口老龄化达到了前所未有的水平.China's population is aging at unprecedented levels.同样,山西省也面临着人口老龄化的巨大挑战.Shanxi province is also confr...
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...