But the same vacuum can be converted into a door 但是,同樣的真空能被轉(zhuǎn)換成門(mén)。
When a constant heating temperature is maintained , increasing the vacuum can speed up the drying process 當(dāng)加熱溫度恒定,提高加熱濕度,能加快干燥速率。
The increased speed simplifies the bec apparatus quite dramatically because the vacuum can have 100 times as much residual gas in it 速度的增加可以大為簡(jiǎn)化bec儀器,因?yàn)檫@時(shí)真空里殘留的氣體量可以多100倍。
The two main schools of thought about speciation that emerged in the 20th century to fill this intellectual vacuum can be summed up as “ breeding defined ” and “ niche defined ” 20世紀(jì)出現(xiàn)的填補(bǔ)了這項(xiàng)學(xué)術(shù)空白的兩大思想學(xué)派可被總結(jié)為“繁殖決定型”和“環(huán)境決定型” 。
The ground tests of inflatable structures can hardly reflect real work environment in space because of the effect of gravity and atmospheric pressure . and tiny gravity and vacuum can hardly be satisfied at the same time . moreover , the cost of space testing is prohibitive expensive 空間充氣展開(kāi)結(jié)構(gòu)的空間實(shí)驗(yàn)花費(fèi)往往極為昂貴,而由于重力和大氣壓力的影響,充氣結(jié)構(gòu)的地面實(shí)驗(yàn)又很難模擬實(shí)際空間工作環(huán)境,微重力和真空環(huán)境也很難在較大空間內(nèi)同時(shí)實(shí)現(xiàn)。