... 无线电探测定位radio detection and ranging 渐近的物体an approaching object 气象图a synoptic chart ...
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an approaching object
接近的物体
以上为机器翻译结果，长、整句建议使用 人工翻译 。
We must develop the means to secure the longest possible warning of an approaching object, as well as its likely trajectory and impact zone.
FORBES: Space: Our Ticket to Survival
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