cie物理简谐振动
人类祖先经历了什么,才被逼进化成了恐怖直立猿?
changing the period of a pendulum
forallthat," resumedthependulum
period of physical pendulum
Tips:Do Not Provide
Personal Loans: Go Easy On Your Finances
Finance, Finance, Finance, Foreign Exchange, Stocks, Currency Circle, Venture Capital, Bitcoin, ICO...