The dawns here in the mountains are very beautiful.这里山区的黎明是很美的.Day breaks .; Day dawns .天亮 了.The dawns were heralded by the descent of a chill stillness.自天而降的一阵寂寞冷落的清寒,引来了一天的黎明.Day dawns in the east.东方破晓。...
The source is made of semiconductor laser, collimating and coupling system, narrow pulse driving circuit.光源包括半导体激光器 、 准直耦合元件和窄脉冲发射驱动电路.Using video - cam directly collimating on computer screen, it is convenient to operat...