When you're typing on your Blackberry, Android, iPhone, don't bother switching layouts to the punctuation layout to hit the period and then a space, then try to capitalize the next letter.
当你在黑莓、安卓系统手机、iPhone上打字的时候， 别那么麻烦地切换到符号界面 去输入句号，空格，然后试着让首字母大写。