Von Jouanne and co-workers plopped the buoy in the 15-foot-deep channel and buffeted it with two -, three - and four-foot waves.
Von Jouanne和同事把浮标扑通一声扔进15英尺深的水道，并用2英尺、3英尺和4英尺的波浪冲击了它。
2
The Intelligent water level meter by the buoy is designed to meet the need of water discharge auto-measurement at the outlet of irrigation channel of the Yellow River.