fourfold

英 [ˈfɔːfəʊld]

美 [ˈfɔːrfoʊld]

adj.  四倍的；四重的
adv.  四倍地；四重地

BNC.21904 / COCA.23621

英英释义

adj

• four times as great or many
  1. a fourfold increase in the dosage
  Synonym:quadruplefour-fold
• having four units or components
  1. quadruple rhythm has four beats per measure
  2. quadruplex wire
  Synonym:quadruplequadruplicatequadruplexfour-fold

adv

• by a factor of four
  1. the price of gasoline has increased fourfold over the past two years
  Synonym:four times

双语例句

• Fourfold or greater change in serum antibody titer to Y.pestis F1 antigen.
  耶尔森氏鼠疫杆菌F1抗原的血清抗体滴度升高4倍或更高。
• Last year, Chinese investors bought 73 tonnes of bullion, up fourfold from 18 tonnes in 2007.
  去年，中国投资者购买了73吨黄金，是2007年（18吨）的4倍。
• If the threat of rabies arose every five years, targeting all the wolves in the corridors would cut the risk of extinction over a20-year period by fourfold.
  如果对居住于峡谷内的所有狼群每五年开展一次狂犬病治疗，在20年内，埃塞俄比亚狼种灭亡的可能性将降低四倍。
• World prices for many of these minerals have doubled in2011, on top of a fourfold increase last year.
  许多这些稀土矿产品的世界价格继去年翻两番之后，在2011年已翻了一倍。
• Chinese authorities have already told Beijing that the cost of water will increase fourfold next year.
  中国的有关部门早已告诉北京，明年中国的水费价将增长四倍。
• The population in this area has increased fourfold.
  该地区的人口已增加到四倍。
• Experiment of fourfold frequency divider proved the feasibility and validity of the method.
  四倍分频器电路演化实验结果验证了该方法的可行性与有效性。
• We have evaluated this clustering for several sample queries that restrict their search to a single group_PDB value ( i.e.," HETATOM") and found that it can improve query performance fourfold.
  我们已经通过几个将搜索限制于单个groupPDB值（即HETATOM）的样例查询评估了这种集群并发现它能够将查询性能提高四倍。
• After five years, those women had a fourfold higher risk than average women of developing breast cancer.
  五年后，研究人员发现这些女性患乳腺癌的风险达到了普通女性的四倍。
• Over the same period copper prices have risen fourfold.
  而同期，铜价上涨了3倍。