Talk very briefly about innovation cycles, things that grow, have a lot of activity; they die out when they're replaced by something else. 简短地谈一下发明创造的周期，周期发展时会衍生许多活动，当这些活动被其他活动取代，此周期就灭亡了。 These things
The decisions we make as consumers affect the lives of ordinary people thousands of miles away, in countries we may never visit. 我们作为消费者所做的决定会影响到数千里之外普通人的生活。他们生活在我们可从没有去过的国家。 If we buy illegal wildlif
Hi everybody. 大家好！ Wednesday is Earth Day, a day to appreciate and protect this precious planet we call home. 下周三是世界地球日，这是我们珍惜和保护这个作为我们共同家园的珍贵星球的日子。 And today, there's no greater threat to our pla
