Today's Sentence
Video not in English?They're extremely patient when it comes to new foods. They'll taste just a tiny portion at first, wait to see if that food makes them sick, and only if it doesn't will they consume the rest. This is called delayed learning, and it's why rats are notoriously difficult to poison.
Original Video:Why Cities Can’t Get Rid Of Rats

hangingmews7 years ago
Notoriously difficult
莊鎧瑋7 years ago
day 302
Dao Nguyen5 years ago
91
Dao Nguyen5 years ago
Dao Nguyen5 years ago
93
Dao Nguyen5 years ago
Dao Nguyen5 years ago
85
Dao Nguyen5 years ago
chiimei6 years ago
hebb107 years ago