转向：指在行进中改变方向或立场。
about turn //
a military command to a formation of men to reverse the direction in which they are facing (军事口令)向后转
名词 a complete change or reversal, as of opinion, attitude, direction, etc (意见、态度或方向的)彻底转变
动词 to perform an about-turn 向后转
从修道院（abbey）开始向后转（about turn）结束。
请问你们中午想喝点什么 » Can you tell us if you want to drink something at noon 约转 » About turn 漂亮 你赢了 » nice you were to win ..
Don't worry about the letter—I'm sure it'll turn up.
别为那封信担心，我相信会找到的。
The government did an about-turn over nuclear energy.
政府对核能的态度来了个180度的大转变。
When I was about to turn left at the end of the hallway, the chill disappeared and I stopped.
我在走廊尽头正要左拐的时候，那阵寒意消失了，我停下脚步。
Scientific American magazine says huge lasers turn only about twenty to thirty percent of the energy they use into a laser beam.
VOA : special.2010.09.01
Didn't I know anything about turn about to right, but now I think I know enough to amuse them and to entertain them.
我从前从不知道这些东西，但现在我已经学的足够多,足够引起他们的兴趣了。
媒体、教育、市场课程节选 : 麻省理工公开课
On Tuesday we'll turn to a more specific subject matter: hermeneutics, what hermeneutics is, how we can think about the nature of interpretation.
周二我们会讲到一个更具体的问题：,即解释学，解释学是什么，我们该如何看待解释学的本质。
文学理论导论课程节选 : 耶鲁公开课
It tells about different reasons people turn to God.
VOA : special.2009.08.14
"Insurgencies last a long time." "But,as you look at how long it took to turn Iraq around, it was about 18 months.
VOA : standard.2010.07.22
So, Ford scoured auto-enthusiast websites and owner forums to see what drivers were saying about turn indicators.
WSJ: How Big Data Is Changing the Whole Equation for Business
When he got most of the tax cut he did an about turn and started to talk up the economy.
It sealed a remarkable 18-run win and signalled an about turn in the series which England went on to win 3-1.