fourfold是什么意思音标:英 ['fɒːfəʊld]美 ['fɒrfold]

a. 四重的, 四倍的, 四垒的
adv. 四倍, 四重

r. by a factor of four

fourfold的用法和例句：

1.For a diagnosis of tularemia you need a fourfold increase in serum antibody levels.

如果血清抗体滴度增加了四倍 则可确诊兔热病

2.I'm proposing a fourfold increase in capital expenditure based on biological and hardware advances.

基于生物和硬件的发展 我提议将资本支出提升四倍

3.And over four milpon tonnes of tuna are caught worldwide each year, a fourfold increase in as many decades.

每年全球金枪鱼渔获量超过四百万吨 这一数字在几十年内增长了四倍