Birds use warm air currents to help their flight.

　　鳥(niǎo)利用暖氣流助飛。

　　The birds are found in over 70 different localities.

　　現已發(fā)現這種鳥(niǎo)棲息在70多個(gè)不同的地區。

　　The lake is noted as a home to many birds.

　　這個(gè)湖作為許多鳥(niǎo)類(lèi)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(niǎo)兒。

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

　　有些曾經(jīng)隨處可見(jiàn)的鳥(niǎo)類(lèi)現在日益稀少。