He designed it to flip open from the top rather than from the side because then it wasn't culturally specific, as people in North America and Europe would want it to open from left to right, whereas people in Japan, for example, might want it to open from right to left.
他設計的翻蓋是從頂部而不是側面打開的,因為這樣就沒有文化差異,北美和歐洲人希望它從左到右打開,而日本人可能希望它從右到左打開。