Emerson's words might also serve as an epigraph for the pages that follow.爱默生的话也可以作为以后历史篇章的格言.Every cut of ancient epigraph of this kind is precious.这种古代金石铭文,一刻千金.As aspecial case , the viability of epigraph of a su...
Getter - ion pumps decrease chamber pressure by chemical reaction of residual gases with an evaporated metal.吸气离子泵通过剩余气体与蒸发的金属之间的化学反应减少了内腔的压力.Recent electronic means of pumping using low temperature sorption techniques a...
During the rhythmic beating , they perform rice planting, harvesting, threshing and husking.人们此起彼伏、错落有致的敲打中, 表演插秧 、 收割 、 打谷、舂米等.The sales of rice and wheat flour and the service of husking rice.稻米、面粉之销售及碾米加工....