something that has both positive and negative consequences
有利也有弊的事物 (you li ye you bi de shiwu)
"AI surveillance is a double-edged sword for security and privacy."
"人工智能监控对于安全和隐私来说是一把双刃剑。" (rengong zhineng jiankong duiyu anquan he yinsi laishuo shi yi ba shuang ren jian)
in a state of great excitement or activity
an honest and open conversation between friends
to move forward or improve
to have a personal reason to complain or criticize
something very easy to do
to reserve something for a particular purpose
