Like a buck rub, a scrape is both a visual and an olfactory signal.
像雄鹿擦痕一样，雄鹿窝既是一种视觉信号，也是一种嗅觉信号。
2
Another visual signal produced by while-tailed deer is termed a buck scrape.
另一种由尾鹿产生的视觉信号被称为擦鹿信号。
3
The difference of output voltage of inverter and 220v is set as control signal, controller change the PWM signal to regulate buck-boost converter and three-phase rectifier.