millihertz
n. [物] 毫赫
例句
As these waves pound against the sea floor, they generate a constant vibration with a frequency of about ten millihertz, much too low for humans to hear but easily detectable with seismometers.
当这些压力波撞击海床时,会产生一种频率为0.01赫兹的连续振动,而对我们人类而言这个频率太低了,所以根本听不到,但却很容易被地震仪侦测到。