why some things catch on, and other don't why some things catch on, and others don't why some things catch on, and others don't / Trade-off :：why some things catch on, and others don't / 权衡：你的产品要的是体验，还是便利？：why some things catch on, and other don't why some people have it and others don't why some people have it and others don's why some people see things clearly and others don't 取舍：高质感vs.超便利，找到核心定位，才能赢得市场：why some things catch on, and others don't why some companies make the leap ... and others don’t