while (stack.length 0 && nums[stack[stack.length - 1]] <= curHeight) {
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，更多细节参见91视频
▲ 图源：9To5Google
在拥挤的高速上，我们时常遇到从隔壁车道加塞过来的车，自适应巡航系统总会留出足够的车距，面对加塞时也能柔和地减速，让我感觉甚至比自己驾驶得更“老到”。
Everstine is the technical director of food safety solutions at FoodChain ID, a company that advises food-sector clients.