laser dot disc 激光点磁盘
laser dot matrix 激光点阵
quantum dot laser 激光器 ; 量子点激光器
dot matrix laser 点阵激光
Dot matrix laser coding 点矩阵式激光喷码
Quantum dot doped fiber laser 量子点光纤激光器
Often the projected light dot on a laser pointer is too small to be seen effectively.
通常激光指物棒中设定好的激光点太小了，显示的效果不是很好。
No, because nothing is actually crossing the surface of the moon - the dot isn't an actual object, it is just a series of photons in the laser beam hitting the surface.
其实不是这样，这是因为此时并没有什么实际的东西真正地横跨了月球的表面-亮点不是一个实体，它仅仅是击中月球表面激光束里一系列的光子。
There are three main types of printers? Dot matrix, inkjet and laser.
打印机主要有三种类型？针式、喷墨和激光。
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