placoderm

英英释义

• n.

  1.an extinct animal resembling a fish that was covered with bony plates and lived in the Paleozoic era.

英汉例句

• 1.The team later discovered a placoderm of a different species but similar date, with three smaller embryos inside it.

  研究小组后来发现了年代相近的另一种盾皮鱼，里面有三个较小的胚胎。

• 2.Some male placoderm fossils show evidence of "graspers" that held the female fish during copulation.

  一些雄性盾皮鱼化石显示出在交配期间用来抓住雌鱼的“紧握器”的证据。

• 3.It is a new species of placoderm, the type of armour-plated fish that dominated the Devonian oceans for 70m years.

  它是盾皮鱼中的新种类。盾皮鱼身上覆有盔甲，统治泥盆纪海洋达7000万年。