perpetual motion machine
A person who has very progressive views.
(roofing) The live load due to the weight of snow on a structure, such as a roof; included in the design calculations.
(physics, pseudoscience) A hypothetical device that exhibits perpetual motion, especially one that does useful work with no input of energy.
present participle of lend a hand
何十年もの実験的な試みにもかかわらず、どの発明家も消費するエネルギーより多くのエネルギーを生み出す永久機関の製作に成功していない。
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DiQt
Free
★★★★★★★★★★
