可以这样说，至少在商用车领域，L4级别无人驾驶自动驾驶不是科幻，而是有明确政策支持、商业化闭环、多家试点的进行时。
* 时间复杂度：O(len1 + len2)，空间复杂度：O(len2)（栈+Map的空间）
。业内人士推荐新收录的资料作为进阶阅读
Lowering the AST to the IR requires allocation a list of blocks for each
As a result, NASA will stick with the current version of the SLS with the addition of the "standardized" upper stage. No other details were provided.