if (n <= 1) return;
Pallab GhoshScience Correspondent，这一点在爱思助手下载最新版本中也有详细论述
Eve Myles plays Det Annie Cassidy in an upcoming crime series，详情可参考safew官方下载
Columnar or ortholinear keyboards stack the keys in orderly columns, often with rows that are not linear. Proponents claim this makes the keys easier to reach. Whether that’s true will be up to your fingers to decide, but I can say for certain that if you learned to type on a staggered keyboard, switching to a columnar layout is tough. It will take days, possibly weeks before you instinctively hit the C key. The N, M and B keys don’t fare much better.，更多细节参见搜狗输入法下载