leave alone

基本解释

In old China there was hardly any machine-building industry, leave alone an automobile industry.
在旧中国几乎没有机器制造工业，更不消说汽车制造业了。
So, in this article I am going to concentrate on the business-level, technology-agnostic analysis classes, and leave alone almost all technology issues until we discuss design.
因此，在这一步，我将会侧重于业务方面的，与技术无关的分析类。在讨论设计的时候再讨论涉及技术的部分。
Such surveillance is essential to determine whether numbers are rising or falling, and to locate the strongholds that humans should leave alone.
对于判断老虎的数量是上升还是下降，以及确定人类应该远离的老虎盘踞地的位置，这种监测是至关重要的。

It means to leave alone and not interfere.
I'm just gonna hit enter to leave it alone, and now I'm back at the prompt.
我们只需要敲入回车键，不管它就可以了，我们又立刻回到刚刚的界面。
哈佛公开课 - 计算机科学课程节选
If you leave the body alone, maybe there's no force acting on it.
如果你把物体丢在一边,可能就没有外力作用在它上面
耶鲁公开课 - 基础物理课程节选

Although I came into this world alone and will leave alone, I am not alone.
NPR: Natural Links in a Long Chain of Being