Okay , now the Mastodon is from the semi - late Jurassic period.接下来这头乳齿象是来自侏罗纪中后期.Barney : Hi that's not a mastodon, its Fred singing.那可不是乳齿象, 是弗雷德在唱歌.They hunted huge creatures like the mastodon, which were similar...
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...