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(xiàn)已發(fā)現(xiàn)這種鳥棲息在70多個不同的地區(qū)。

　　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?jiān)趬ι纤艡C(jī)捕捉鳥兒。

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

　　有些曾經(jīng)隨處可見的鳥類現(xiàn)在日益稀少。