At the other end of this lab is where the clock signals come in, so the hydrogen maser is in the bunker that's underneath here in its concrete shell, and it sends up its reference tone 10 megahertz signal.

在这个实验室的另一端是时钟信号输入的地方，所以氢脉泽在它下面的混凝土外壳中的掩体中，它发送它的参考音调 10 兆赫兹信号。