life is brief

they  should  provide  adequate  support.

who can guarantee that  his story is true?谁能保证她的话是真的？

pioneer  n. 先锋，先驱

he was a pioneer of  global captialism .

他是全球资本主义的先驱。

i cannot  guarantee you that all of this  is gonna succeed. 

to hear her talk .

identify  v. 确认