The bird is now a rare sight in this country.

　　如今在這個國家，這種鳥已罕見了。

　　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 cat was on the wall, watching for birds.

　　那只貓在墻上伺機(jī)捕捉鳥兒。

　　You don't often see this bird in daytime.

　　這種鳥白天不常見。

　　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。