美语听力 English Cafe 284

　　Topics: John Audubon and the Audubon Society; Famous Songs: “On Top of Old Smokey”; sign versus signal; figure out versus find out; to beat a dead horse
　　Words:
　　ornithologist
　　to sketch
　　naturalist
　　to illustrate
　　bird-banding
　　taxidermy
　　to become extinct
　　to court
　　grief
　　parody
　　spaghetti
　　to sneeze
　　sign
　　signal
　　to figure out
　　to find out
　　to beat a dead horse