极少受训者坚持到底了。
如果消费者表示他们想要信息透明，那就告诉他们你的产品里到底有什么。
If consumers say they want transparency, tell them exactly what is in your product.
既然捕食者可以让雏鸟为食物付出巨大代价，那么乞食的雏鸟们到底可以从这种交流方式中得到什么益处呢？
Given that predators can make it costly to beg for food, what benefit do begging nestlings derive from their communications?
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