Managing and successfully operating an environment at that scale requires tremendous skill and discipline, plus significant preparatory work and solid decision making on many disparate topics.
管理并成功地运行一个这样规模的环境需要极高的技巧和规程，还要针对许多全异的主题进行大量的准备工作和可靠的决策。
This further implies that the change of voice at different times on different topics is very vital and significant.
也就是说在不同时间对不同的题目用不同的语言是有非常重要的意义。
Topics covered this Friday include a look back at some of the most significant international stories of the year.
这周五主题包括回顾一些最重要的国际新闻事件。
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