基本解释[物理學]廻跳比例計數器词组短语短語recoil proton proportional counter 反沖質子正比計數器hydrogen recoil proportional counter 氫反沖式正比計數器proton recoil proportional counter 質子廻跳比例計數器recoil proportional counter更多词组专业释义物理學廻跳比例計數器