Efficiency: When we push, we only visit each node once. When we pull, we again only visit each node once. This is about as efficient as things can get.
Rights groups have alleged that Iran's brutal crackdowns against protesters and critics of the regime has been fuelled by Chinese facial recognition and surveillance tech, shared by Beijing.
。关于这个话题，新收录的资料提供了深入分析
它讓人們相信：有一天，他們也能打造屬於自己的那座小屋、屬於自己的理想生活。而那正是許多被忽視的群體最需要的：希望。
FirstFT: the day's biggest stories，更多细节参见PDF资料
Hurdle Word 1 answerFRITZ
FirstFT: the day's biggest stories，详情可参考新收录的资料