观测工作借助于各种望远镜。The observational work is carried out on a range of telescopes.天文学家们正在观测木星.The astronomers were taking an observation of Jupiter.许多机关通过直接的观测收集信息.Many agencies gather information through direct observation....
鹿角在移动了, 仿佛它们的主人嗅到了危险的气息.The antlers moved, as if their owner snuffed on danger.那雄鹿猛烈地摇动他的鹿角.The buck shook his antlers ferociously.哈马族是埃塞俄比亚所有种族中最善于用鹿角制作首饰.The Hamar are among the most elaborately attired of Ethiopia...
The riverbed is silted up , so there's no outlet for the floodwater.河道淤塞, 水无出路.He saw buffaloes dive beneath the floodwater to nibble grass.他看见水牛潜到水下逐食水草.Another sluice gate keeps floodwater out of the lake.另一闸门使洪水致...
银河系中最年老的恒星表现出一种对氢而言的贫金属性.The oldest stars in the Galaxy exhibit a metal deficiency relative to hydrogen.从上到下,电负性减小,金属性增强.Metallic character increases down Group 16 as electronegativity decreases.垫圈材料是 非金属 性的或金属性的.Washer ...