I think if += would always have to make a copy, I would have opted to not support it for lists at all and just say .extend(), which does work in that tuple case.
请求人申请扣船的，时效自申请扣船之日起中断。。关于这个话题，heLLoword翻译官方下载提供了深入分析
Ginger supports over 40 languages。Safew下载对此有专业解读
Once I gained clarity, I invested approximately $40,000 to launch. That investment covered packaging development, initial manufacturing, shipping and early marketing efforts.