说不定他无法鉴别水底的反射信号。
更近一点例子是，“日光反射信号器”一直通过类似的方式传递军事信号。
More recently, so-called “heliographs” have been used to relay military signals in a similar way.
更近一点例子是，“日光反射信号器”一直通过类似的方式传递军事信号。
More recently, so-called "heliographs" have been used to relay military signals in a similar way.
一听到发动机声响，就探出窗外，利用镜子的反射打出信号。
When he heard an engine, he leaned out the window and flashed a signal.
这些被反射的信号也许干涉直接信号。
These reflected signals may interfere with the direct signal.
利用反射镜法对其小信号增益系数进行了测量。
The small signal gain of the continuum was measured with the mirror.
利用反射镜法对其小信号增益系数进行了测量。
The small signal gain of the continuum was measured with the mirror.
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