... Radiolabelled compounds 放性性同位素标记化合物 Range-finding test 范围确定试验 Rate of preimplantation deaths 着床关死亡率 ...
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range-finding test
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以上为机器翻译结果，长、整句建议使用 人工翻译 。
Conveniently, more modern spacecraft than the Pioneers include separate range-finding hardware, which can be used to test the accuracy of the Doppler method.
ECONOMIST: A space oddity
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