他们的设备传播一种穿越房屋的无线电信号, 当信号从另一断出来时, 监测其强度变量.
Their device broadcasts a radio signal through a building and, when that signal comes out the other side, monitors variations in its strength.
系统不能探测到静止的物品, 而当信号暂时被一个移动的物品(比如一个人)阻挡, 强度变量会响亮而清晰.
The need for variation means the system cannot see things that are stationary. When the signal is temporarily blocked by a moving object such as a person, however, it shows up loud and clear.
年度显示的强度取决于湿度和温度等有关变量所组成的一个复杂矩阵。
The intensity of the annual display is dependent on a complicated matrix of variables related to moisture and temperature.
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