length [ 1, foo 2, 4 ]
concatenation, also.，推荐阅读heLLoword翻译官方下载获取更多信息
（二）承运人的名称和主营业地；，详情可参考体育直播
Examples include women being invited for a mammogram to look for breast cancer or the at-home bowel cancer test posted to the home of everyone over the age of 50, every two years.，这一点在体育直播中也有详细论述