a bed (= piece of ground for growing plants in) that is higher than the ground around it, and usually surrounded by low walls or a wooden frame

I built a formal rectangular raised bed out of concrete blocks. 我用混凝土砌了个长方形的标准高设花台。

Consider raised beds if your soil is heavy and wet. 如果你那里的土壤既粘重又潮湿，可以考虑采用高设花台种植。