词汇	He feels very tired
释义	He feels very tired. 他觉得很累。
随便看	specific water retention specific water yield specific waveband specific wavelength specific wearability specific wear rate specified account specified achromatic light specified achromatic lights specific volume specific-volume specific volume anomaly specific-volume anomaly specific volume heat specific-volume heat release rate specific volume in situ specific volume of coal-oil mixture specific volume of explosion specific volume of sea water specific volume of swelling specific volume power specific volume request specific volume resistance specific volumetric dilatation specific volumetric fracture work of rock