读“气压带风带移动规律模式示意图”，回答下题．
当一条鲤鱼被钓鱼人诱骗上钩后，能迅速分泌一种化学物质遗留在钓钩中，使钓鱼人长时间钓不到鲤鱼．鲤鱼的这种习性是一种（ ）
It is u____ acknowledged that people cannot succeed or achieve their targets without a strong will and persistence.
