吉祥物一是鸭嘴兽.One of the mascots was the platypus.但是, 这种全身毛皮的哺乳动物却是通过产卵孵出小鸭嘴兽的.However, this fur - covered mammal lays eggs from which the babies are hatched!鸭嘴兽的家可以在水中,也可以在陆上.它是两栖动物.At home both in water and on land, the pla...
Mariners were also able to fix their latitude by using an instrument called astrolabe.海员们还可使用星盘这种仪器确定纬度。prismatic astrolabe棱镜等高仪Other early instruments included the sextant and the astrolabe.另外的早期仪器还有六分仪和星盘.photoelectric...