Narrator:Even when you have exactly the right conditions, truffles aren’t guaranteed, and hunting them is a labor-intensive process. Once you know where to look, you have to sniff out and dig up each truffle by hand, and they can...
Pigs have a very good sense of smell. In France, people teach pigs to find truffles(松露).Truffles are very rare(珍稀的)and 6 . Pigs can find them faster than dogs. "As stupid as a pig," people sometimes say. But this is not 7 . Pigs are one of the ten smar...