Finally there are external effects: the unpriced costs reflected in the modern environmental crisis.

最由外部效应：未标价的成本反映在现代环境危机中。

So one day I saw a beautiful piece of eel just sitting there, unpriced, and I asked the fisherman for it.

所有一天看到一条非常好的鳗鱼放在那里没标价格，向渔民要这个。