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int digits = 0;，这一点在safew官方下载中也有详细论述
It’s two decimal digits long, it’s prime, it’s a palindrome and it’s the number of players in a football team.，更多细节参见搜狗输入法下载
Each half of the board hinges in two places for minutely customizable center tenting. It has low profile keys with responsive yet quiet mechanical switches. It works wirelessly or corded, has thumb cluster keys and, of course, it’s all fully programmable. It's lovely to type on and the thumb clusters and modules make it easy to keep your fingers in the home position to minimize repetitive travel.