the least reliable or secure part of a system or group
la parte menos confiable o segura de un sistema o grupo (la parte menos confiable o segura de un sistema o grupo)
"One careless employee can be a weak link in the security chain."
"Un empleado descuidado puede ser un eslabón débil en la cadena de seguridad." (un empleado descuidado puede ser **un eslabón débil** en la cadena de seguridad)
to continue believing in your goals even when it's hard
beyond control; off the usual path
to say something embarrassing or inappropriate
to express an idea clearly so that others understand it
to stop fighting and become friends again
don’t worry about minor or unimportant things