be on guard;take care
"Beware of telephone salesmen"
Macbeth! Macbeth! Beware Macduff.
出自：Macbeth , Shakespeare
I had bewar'd if I had foreseen.
Beware lest..Thou tell'st the story of thy love unseen.
出自： W. Morris
Someone who..he felt was an enemy; a being to beware of.
出自： H. Allen