单词	be duty -bound to
释义	be duty -bound to 🌏有责任
随便看	grating coupled surface emitting grating coupler grating coupling grating cover grating deck grating demultiplexer Grating design grating diaphragm grating diffraction grating diffraction fringe method grating diffration grating diffuser grating digital display grating digital linear measuring system grating digital measurement milling machine grating digital readout grating disc grating dispersion grating displacement measurement grating displacement sensor Grating-displacement sensor grating displacement transducer Grating ditial display grating dividing engine grating efficiency