Birds use warm air currents to help their flight.

　　鳥利用暖氣流助飛。

　　The birds are found in over 70 different localities.

　　現已發現這種鳥棲息在70多個不同的地區。

　　The lake is noted as a home to many birds.

　　這個湖作為許多鳥類的棲息地而聞名。

　　The cat was on the wall, watching for birds.

　　那只貓在墻上伺機捕捉鳥兒。

　　Some birds which were once a common sight are now becoming rare.

　　有些曾經隨處可見的鳥類現在日益稀少。