to become calmer after being angry or excited
在生气或激动之后变得冷静 (zai shengqi huo jidong zhihou biande lengjing)
"Give him a few minutes to simmer down before you talk to him."
"给他几分钟时间冷静下来再和他说话。" (Gei ta ji fenzhong shijian lengjing xialaizai he ta shuohua.)
You said exactly what I was thinking
to have influence or importance
A person who behaves unpredictably and may cause problems.
a risky or uncertain situation where the outcome is doubtful
to be very brave and bold
to betray someone who trusts you