sound off

动词 sound off:

1. speak one's opinion without fear or hesitation
   同义词：opine, speak up, animadvert
2. start playing
   同义词：strike up
3. express complaints, discontent, displeasure, or unhappiness
   同义词：complain, kick, plain, quetch, kvetch

1. Gosh, that guy is sounding off again!
   天哪，那个家伙又在夸夸其谈了！
2. He's always sounding off about how he would manage the firm.
   他总是大言不惭地说他能把公司经营好。