Sorry, I ran out of credit term paper websites It was quite intensive at the time as they didn't have much data on what is really appropriate level of training. But now they have enough data for this and the current level is what is generally accepted globally. 必須 2000文字以内 [bbs:youtube:(Youtubeの動画ID)]と書くとYoutubeの動画が貼れます。(例:[bbs:youtube:OQThUAQ0UN0])