词汇	蝉急
释义	蝉急 chán jí謂蟬聲緊促。
随便看	optical Kerr-gate optical key optical keystone corrector optical klystron optical klystron free electron laser Optical Label optical label swapping technology optical label switching optical label switehing optical laboratory optical lamp optical landing system optical lantern optical laser optical laser radar Optical Laser Ranging System optical lasers optical laser unit optical lattice optical lattice constant optical lattice fir filter optical lattices optical lattice vibration optical layer multicast optical layer multieast