a clever and intelligent person
聪明而机智的人 (cōngmíng ér jīzhì de rén)
"Don’t underestimate her—she’s a smart cookie."
"不要低估她——她是一个聪明的人。" (Bùyào dī gū tā——tā shì yīgè **smart cookie**.)
feeling uncomfortable in an unfamiliar situation
to remain firm in your beliefs or decisions even under press...
in a risky or dangerous situation
used to introduce an opinion that may or may not be useful
to have a big, broad smile showing happiness
an early warning of potential danger