墙头草: 1.(墙头上的草) grass on the top of a wall which sways with every wind2.(比喻随风倒的人) a person who bends with the wind; fence-sitter
两边倒: lean now to one side, then to the other; lean on both sides; waver 短语和例子墙上一棵草, 风吹两边倒。 a tuft of grass atop the wall sways right and left in the wind
墙上一棵草风吹两边倒: a tuft of grass atop the wall sways right and left in the wind