犁底层 [土壤] plough pan ; tillage pan ; [土壤] plow pan
犁底 ploughing sole
单底板犁 single bottom plow
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在几个小时内浮游生物的盛宴即将结束，而蝠鲼犁其头鳍于海湾的沙底中，等待下一批猎物的到来。
Within hours the plankton run out, the feast winds down, and the mantas plow the bay's sandy bottom with their cephalic fins to throw hidden prey back into the water column.
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