To measure the difference in elevation between poles, surveyors used an optical level—a telescope on a level base—placed halfway between the poles.
为了测量两极之间的高程差,测量员在两极中间的一个水平基座上使用了光学水准望远镜。
These carnivores live only on four small islands in the archipelago where, scientists note, the prey base is too small to support mammalian carnivore.
科学家指出,这些食肉动物只生活在群岛中的四个小岛上,那里的猎物基数太小,哺乳类食肉动物无法生存。
On May 5, 2011, several Israeli scrap tanks were neatly placed in a scrapyard of an army base near the southern Israeli city of Buffalo.
2011年5月5日,以色列南部城市水牛城附近的一座陆军基地的废品场内整齐地摆放着数辆以军报废的坦克。
The shell dropped and exploded above Fort Sumter, a United States military base on an island in the harbor.
VOA: special.2009.08.13
They also found some stockpiles of the virus from the 1950s that they still had on an Army base in Maryland,I think.
政府也在马里兰军队驻地发现了,从十九世纪五十年代储存到现在的病毒
Douglas was born on an Army base near the southern city of Little Rock, Arkansas in January,eighteen eighty.
VOA: special.2009.05.24
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