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ravens是什么意思,ravens怎么读 语音:
英音  ['rævənz] 
美音 ['rævənz] 
ravens 基本解释
n.低质煤;渡鸦( raven的名词复数 )
ravens 变化形式
易混淆的单词: Ravens
中文词源
ravens 用法和例句提示:点击例句中的单词,就可以看到词义解释
提示:点击例句中的单词,就可以看到词义解释
Pilots might dismiss ravens as radio-controlled toys , but they are popular with soldiers .
飞行员们也许只把“渡鸦”看成无线电控玩具,但士兵们却对它爱不释手。
There are some 4800 ravens in operation in the army , although plenty get lost .
大约有4800架“渡鸦”在军队中服役,不过其中很多都失踪了。
The american army 's entire annual purchase of almost 1300 ravens is thus lighter than a single fully armed reaper .
美军全年采购的1300架“渡鸦”加起来的重量比一架全副武装的“死神”还轻。
Skip to next paragraphjohn m. marzluff , a wildlife biologist at the university of washington , has studied crows and ravens for more than 20 years and has long wondered if the birds could identify individual researchers .
华盛顿大学的野生动物学家约翰马兹卢夫(johnm.marzluff)对乌鸦和渡鸦的研究已经超过20载,他心中一直有个疑问,这些鸟儿能否认出不同的研究人员?
Unlike bigger drones , whose limited numbers mean that officers in the field are in constant competition for their services , ravens are abundant and thus generally available to provide instant video imagery , day or night .
大型无人机因为数量有限,战场上军官们总是在竞争它们的使用权,而“渡鸦”却不一样,它数量充足,基本上能够提供昼夜的即时视频图像。