to understand or solve the real cause of something
了解或解决某事的真正原因 (liaojie huo jiejue mou shi de zhenzheng yuanyin)
"We need to get to the bottom of this issue to prevent it from happening again."
"我们需要弄清这个问题的真正原因，以防再次发生。" (women xuyao nongqing zhege wenti de zhenzheng yuanyin yi fang zaici fasheng)
someone told me something secretly
to start something energetically and successfully
to start a friendship
showing strong jealousy
to decide to do something without being asked or required
to become very angry
