die out

动词 die out:

1. become extinct
   同义词：die off
2. cut or shape with a die
   同义词：die

1. Many old customs are dying out.
   很多古老的习俗正在消失。
2. 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。
3. 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。