four-fold

英 ['fɔːfəʊld]

美

a. 四倍的；四重的；四垒的
adv. 四倍；四重

双语例句

• The principal advantage over the dual filter coherent detection is a four-fold reduction in bandwidth.
  与双滤波器相干检波相比的主要优点是带宽减少了四分之三。
• The studies of apple polysaccharides precipitation process showed that the better conditions were concentrated four-fold and adding ethanol of 4 times.
  通过苹果多糖醇沉工艺研究，确定苹果多糖的沉淀条件为浓缩4倍，乙醇添加量为4倍。
• Increases have also occurred almost everywhere, albeit to hugely divergent extents: US incomes per head have risen 23-fold and those of Africa merely four-fold.
  增长几乎出现在全球各地，不过幅度存在巨大差异：美国人均收入增长了23倍，而非洲国家仅增长4倍。
• The four-fold increase in oil prices imposed by opec.
  “欧佩克”石油价格的四倍上涨。
• Cultural security including four-fold dimensions from the perspective of cultural philosophy.
  从文化哲学的视角看，文化安全包含四重雏度。
• Finally, crystallized D-ribose was precipitated by adding four-fold amount of ethanol into the enriched effluent.
  解吸液浓缩后加入四倍量乙醇，可得到结晶D-核糖。
• In the experiment, by using GaAs/ AlGaAs QW VCSEL epitaxial chip, the1 × 3,2 × 2, 3 × 3 ID and 2D arrays have been fabricated by the four-fold proton implantation method, and the characteristics have also been measured experimentally.
  实验中，出GaAs／AIGaAs量子阶VCSEL外延片通过四次质子注入工艺制备了IX3、2X2、3X3简单的一维、二维VCSEL列阵器件，并对器件的特性进厅了测量研究。
• According to the plan, by2020, China will produce ten million tonnes of fuel ethanol and two million tonnes of biodiesel, a four-fold increase on2002 levels.
  依据该规划，中国在2020年将生产1000万吨的生物乙醇和200万吨的生物柴油，大概比2002年增长4倍。
• In heteroepitaxial growth on ( 001) surface, at the relative positions of the atoms at bridge sites are higher than the positions of the atoms at four-fold hollows.
  研究表明，在（001）表面异质外延生长中处于桥位原子相对位置较高而处于四重稳定位原子位置较低，而在（111）表面则与其相反。
• An ongoing trial in Uganda shows that coverage rates have increased by from two-fold to four-fold.
  目前在乌干达进行的一项试验表明，覆盖率已由两倍增至四倍。