禁止左转弯的英文：
no left turn

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。

You will just have to wait your turn.
你得等到轮到你才行。

He is turning into a religious maniac.
他正在变为一个宗教狂热分子。