... 在观测者眼睛处的张角 angle at eye of observer 极角 angle at pole 天顶角 angle at zenith ...
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angle at pole
极角
以上为机器翻译结果，长、整句建议使用 人工翻译 。
His plan requires the probe to be accelerated, using its remaining fuel, and then steered at a shallow angle into one of the permanently shadowed regions near the south lunar pole.
ECONOMIST: Creative destruction
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