I'll call back later buy gestanin (Phys.org) âÂÂUnder the right circumstances, pushing on nothing is harder than pushing on something â at least when that something is gold. That's the finding from a new materials science paper, and it's ... 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])