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Excessive energy is also required to achieve appropriate pressures and vacuums.還需要額外的能量來(lái)造成所需的壓力和真空.My personal theory is that needs and desires create mental vacuums.我個(gè)人的理論是,需求和欲望制造了思想真空.Both vacuums and pure oxygen cond...

n.真空， 真空狀態(tài)， 真空度， 空洞...

vacuums的音標(biāo)：...