But by grouping them by sound rather than appearance, the number of characters can be reduced to about 50 of the most common, enough to write messages when mapped to a small number of keys.

• 但是如果将它们按读音而不是外形将它们逐一分类时，最常用语的数量就减少到了50个，这些对于发信息来说已经足够了，并可以被分配在很少的按键上。