the least reliable or secure part of a system or group
系统或小组中最不可靠或最不安全的部分 (xitong huo xiaozu zhong zui bu kelai huo zui bu anquan de bufen)
"One careless employee can be a weak link in the security chain."
"一个不小心的员工可能是安全链中的薄弱环节。" (yige bu xiaoxin de yuangong keneng shi anquan lianzhong de **bo ruo huanjie**)
to grow or improve very quickly
a friend you have known for a long time
someone very precious or loved
To begin to succeed rapidly; to leave the ground.
to use the same tactics as one’s opponent
to take an idea and develop it further or act on it
