[問題] 可以幫我說明一下這篇文章前頭幾句話的意思嘛
Evolutionary models suggest that the cost of a signal can ensure its honesty.
Empirical studies of nestling begging imply that predator attraction can
impose such a cost. However, parents might reduce or abolish this cost by
warning young of the presence of danger.
我已經刪掉後半部了
可以幫我解釋一下COST跟HONESTY的意義嗎?
謝謝
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