There are new uses of words coming in and old uses dying out.

词语的新用法在涌现，旧用法在消亡。

《柯林斯英汉双解大词典》

There are about 6,000 languages that are spoken around the world, but 43% of them are dying out.

世界上大约有6000种语言，但其中43%正在消亡。

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Many animals and plants are in danger because of dying out.

许多动植物由于灭绝而处于危险之中。

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Unfortunately for lovers of dust and beautifully over-engineered gear, the room-sized recording console is dying out fast, replaced by software and small, neat, racks of pre-amps and analog summing mixers.

ENGADGET: Music Thing: Frontier Alphatrack

The research team has discovered that it is much harder for her to feed close to the surface - a possible clue to why her kind is dying out.

BBC: Sea lion test to probe declines

China's trade surplus with America remains large and controversial, but its current-account surplus with the rest of the world is dying out.

ECONOMIST: Exports