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曲别针可以阻止钥匙掉到地上,这是怎么回事?试一试首先要准备好几把拴在钥匙圈上的钥匙,90厘米长的细绳,三枚曲别首先你要准备好几把拴在钥匙圈上的钥匙,90厘米长的细绳,三枚曲别针,一支铅笔。如果,将钥匙串系在绳的一端,曲别针系到绳的另一端。一只手握着铅笔,水平放置身前,另一只手抓住曲别针。将细绳搭在铅笔上让钥匙向下垂挂,使曲别针与铅笔之间那段细绳保持水平,其长度是整
The paperclip can prevent the key from falling to the ground, what is going on? Try first to prepare a few keychain key, 90cm long string, three music first you have to prepare a few to the key Key in the ring, 90 cm long string, three paperclips, a pencil. If you fasten the keychain to one end of the rope, attach the clip to the other end of the rope. Hold a pencil in one hand, place it horizontally in front of you, and hold the paperclip in the other hand. Put the string on the pencil so that the key hangs down, keeping the string between the paperclip and the pencil horizontal and its length