If using dynamic find, make sure all controls that will be manipulated inside the timer have been found and bound prior to starting the measurement.
如果使用动态搜索，那么您需要确定在定时器内部控制的所有控件，都需要在开始评价之前搜索到。
Distance measurement is realized by ultrasonic sensors, light intensity detection is achieved by photosensitive element, timer function is realized by 89c52's timer.
测距是利用超声波传感器来实现，光强检测是通过光敏元件实现，定时功能由89c52单片机定时器实现的。
Distance measurement is realized by ultrasonic sensors, light intensity detection is achieved by photosensitive element, timer function is realized by 89c52's timer.
测距是利用超声波传感器来实现，光强检测是通过光敏元件实现，定时功能由89c52单片机定时器实现的。
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