about-face 是什么意思

	n. 【美军】向后转(的命令)；改变观点[立场、主意]。 2.vi. 改变立场[态度]。

	a major change in attitude or principle or point of view; "an about-face on foreign policy" 同义词：volte-face, reversal, policy change,
	act of pivoting 180 degrees, especially in a military formation 同义词：about turn,

	change one''s mind and assume the opposite viewpoint
	turn, usually 180 degrees

a few days later he made an about-face .
几天以后，他变了卦。

about-face是什么意思