die out

• • 灭绝，死光，不复存在：

    Many species of animals are in danger of dying out.

    许多动物种类都处于濒临灭绝的危险中。

  • 逐渐消失；渐渐停息：

    Gradually the roar died out and the night became quiet.

    吼声渐渐停息，夜晚变得寂静。