die out

消失, 灭绝

例句与用法：

Many old customs are dying out.

很多古老的习俗正在消失。

No one have come up with a convincing explanation of why dinosaur die out.

尚未有人能对恐龙的灭绝作出一个令人信服的解释。

The English of today is very different from the English of500 years ago. In time, some even die out completely.

现在的英语与500年前的英语已大不相同，有一些甚至会在今后完全消失。

详细释义：

逐渐消失; 灭绝

Many old customs have died out.

许多旧的风俗已不复存在。