VOA慢速英语:词汇节目：小心有内奸

symbol – n.. an action, object, event, etc., that expresses or represents a particular idea or quality

eternity – n. time without an end

serpent – n. literary : a usually large snake

skirt – n. a piece of clothing worn by women and girls that hangs from the waist down

tempt – v. to cause (someone) to do or want to do something even though it may be wrong, bad, or unwise

forbid – v. to order (someone) not to do something : formal : to say that (something) is not allowed

slither – v. to slip or slide like a snake

reputation – n. overall quality or character as seen or judged by people in general

behind your back – phrase without someone's knowledge : in secret