摘要： 他们安排了会议以至每个演讲者有不到15分钟的时间发表演讲They formatted the conference so that each speaker had less than 15 minutes to deliver a paper. 我们看到後很害怕。We were horrified 阅读全文

摘要： What about jigsaw puzzle design for visually handicapped?给视觉障碍人士设计拼图怎么样？ Length is 50cm, and then the depth is ... well, it's very little.长度为50cm，然后深度 阅读全文