Animals are least active in the middle of the day, so if you want to avoid shots of them sleeping, head out in the early morning or late in the afternoon when the light is also at its best.
动物在中午的时候活动较少，所以你如果不想拍摄睡觉的动物，就要利用清晨或傍晚的时间，这时的光线也是最理想的。
As the existing great power consumption of empty-load or light-load, the bipolar PWM control can be applied only in small or middle power servo control systems.
在轻载或空载时由于存在大的功率损耗，双极性PWM控制只能被应用于中、小功率伺服控制系统。
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