天文研究开始向整个电磁波谱范围延拓.Astronomical research began to spread over the whole range of electromagnetic waves.分子转动的实验研究被称为微波波谱学.The experimental study of molecular rotation is called microwave spectroscopy.微波波谱学家已经确定了许多分子的转动常数.M...
He fell back into the water, his breath rasping in his heaving chest...他仰面跌进了水中，胸部起伏，呼吸急促。He fell back into the water, his breath rasping in his heaving chest.他仰面跌进了水中，胸部起伏，呼吸急促。He pulled the cloth and it came away with ...