it is on twitter, not formal writing
所有跟帖:
• 问号和句号,意思是不一样的 -luckyman18- ♂ (0 bytes) () 12/02/2016 postreply 18:56:21
• Interesting how.... but... -冒进者- ♂ (81 bytes) () 12/02/2016 postreply 18:58:54
• Question mark for "how" period for "but" -luckyman18- ♂ (0 bytes) () 12/02/2016 postreply 19:08:25