1.To compare “apples and oranges” is to uselessly compare unlike things.
2.The “apple of (one’s) eye” is a favorite or well-like person.
3.To say that “the apple never falls far from the tree” is to suggest that a person’s personality traits are close to those of the person’s parents.
4.“As American as apple pie” means that something is quintessentially representative of American culture or values.
5.“(As) sure as God made little green apples” suggests certainty.
6.To be a “bad apple” or a “rotten apple” is to be a bad person.
7.“one bad (or rotten) apple spoils the whole bunch (or barrel)” implies that one flawed element or person can undermine an effort or a group.
8.To be “rotten to the core” is to be thoroughly bad or worthless.
9.To “polish (one’s) apple” is to flatter someone; a flatterer is an “apple polisher.
10.To “upset the apple cart” is to ruin plans.
11.A “banana republic” is a weak or corrupt country.
12.A “second banana” is a subordinate, and the “top banana” is the leader.
Second banana是下属，top banana指领袖，领导。
13.To “go bananas” is to become excited or crazed, and “to drive (someone) bananas” is to annoy or irritate someone.
Go bananas变兴奋变疯狂，to drive (someone) bananas惹怒某人。
15.To “cherry-pick” is to select carefully.
16.“Life is a bowl of cherries” means that life is easy.
生活像一碗樱桃，暗指生活美好简单。同理如果说人生不如意十之八九就可以这样说：Life isn’t always a bowl of cherries.
17.To “not give a fig” is to be unconcerned.
18.“Melon” is sometimes used as slang for head or, vulgarly, for large breasts.
19.To say that someone or something is a “peach” means that they are beautiful, excellent, or sweet.
20.When everything is “peaches and cream,” life is going well.
21.A “plum” assignment or job is a highly coveted one.
22.One is said to have “sour grapes” when one belittles something one covets but cannot obtain.
23.Forbidden fruit”is something attractive but not allowed.
24. To “bear fruit” is to produce results.