How to grab the sofa with the national K song

There is no trick. Unless you've been opening the software to see.。。 Because everyone's singing time is irregular, unless he tells you in advance when to release the song.

The first reply is called Second Floor, referred to as SF, that is, the sofa. >>>More

The first reply is called Second Floor, referred to as SF, that is, the sofa. >>>More

Literally should be the first to speak! That is, the first floor.

The second floor refers to the second floor of the forum post, taking the first letter of the two words as SF, and then evolving into sofa that means "sofa". The sofa should be from the mop, the function of the mop forum: check the posts that have been made, some people see some very long interesting posts, or very "potential" (there will be a long and interesting reply but there are few replies now) posts, they will reply to a post later, so that it is easy to find this again in the future (mop was very popular at the time, there is only one page, and the default display is the current 30 minutes of replies to the post, so there are thousands of posts. >>>More