Standard Digital
A viewing spot with the clearest view of the horizon is best, particularly to see Mercury and Venus, which will appear very low in the sky.，详情可参考体育直播
input = input[:index] + chr(char) + input[index:]，推荐阅读WPS官方版本下载获取更多信息
FT Digital Edition: our digitised print edition，推荐阅读搜狗输入法下载获取更多信息