回首的英文：
turn around
look back
recollect

参考例句：

To recall the past events
回首前尘

A review of these 3 years shows that we have traversed a tortuous course and that our achievements are hard won.
回首这三年,我们走过的道路很不平坦,成绩来之不易。

APEC has pioneered an effective cooperation modality that galvanizes growth and prosperity in the Asia-Pacific Region
回首过去，我们开创了亚太经合组织合作的成功方式，促进了亚太地区的发展和繁荣。

A review of these 13 years shows that we have traversed a tortuous course and that our achievements are hard won
回首这十三年，我们走过的道路很不平坦，成绩来之不易。

turn是什么意思：
v. 使旋转；翻过来；转弯；转向；转变
n. 旋转；翻转；转弯；变化

Not turn away from the old, but turn toward the new.
不是背弃旧的，而是朝向新的。

As it turned out, the advice was bad.
事实证明，这个主意极不高明。

I'll take you at the turn.
你转身时我再来对付你。

around是什么意思：
adv. 大约；在周围，在附近；旋转；四处
prep. 在周围；在某处；围绕；四处

play around with
在一起厮混|玩弄|戏弄

The blades of the propeller turned around and around.
螺旋桨不停地转动着。

to wind around; to curl up; to revolve around; to orbit
旋绕