gravest

例句:

• We are in the gravest peril.
  我们身处非常严重的危机之中。
  
• At his most hesitant he was also at his gravest.
  他最吞吞吐吐的时候,也就是最严肃认真的时候.
  
• Familiarity deadens the sensibilities, even as connected with the gravest natural phenomena.
  习惯成自然, 人们就是对于重大的自然现象也是如此.
  
• The gravest error, perhaps, was underestimating the risk of tsunamis.
  来自NEWYORKER
• The gravest danger from this election is the intensification of this populism.
  来自WSJ
• War crimes and crimes against humanity are among the gravest crimes in international law.
  来自BBC