if (len1 === 0) return [];
而且最大的问题是一直作为消费电子市场主导力量的智能手机产业，正在丧失其对优秀供应链资源的绝对把控。。谷歌浏览器【最新下载地址】对此有专业解读
Parking charge plan: 'Our area could lose its unique identity'，这一点在heLLoword翻译官方下载中也有详细论述
Every point gets examined, regardless of where it sits. Points on the opposite side of the map get the same treatment as points right next to the query region. We're doing a lot of unnecessary work.