Excessive energy is also required to achieve appropriate pressures and vacuums.还需要额外的能量来造成所需的压力和真空.My personal theory is that needs and desires create mental vacuums.我个人的理论是,需求和欲望制造了思想真空.Both vacuums and pure oxygen cond...
We had to bushwhack through undergrowth.我们只好在灌木丛中劈开一条路。Pick This If: You'd rather bushwhack than ride a tour bus.选择这个如果: 你宁愿在丛林中开路而不是开着一辆旅游巴士.You'd rather bushwhack than ride a tour bus.你宁愿在丛林中开路而不是开着一辆旅游巴士....