4 fold increase rate 倍增长率
The formoterol and Corticosteroid Establishing Therapy study compared the effects of a 4-fold increase in the budesonide dose with and without formoterol.
福莫特罗和皮质醇疗效证实“研究比较布地奈德剂量增加4倍后加入与不加入福莫特罗的效果。”
Countries like Senegal and Uganda can expect e-waste flows from PCs alone to increase 4 to 8-fold by 2020.
像塞内加尔和乌干达一类的国家，预计到2020年单产生自个人电脑的电子垃圾就会翻4到8番。
Diameters of these vessels only increase 4 fold.
这些血管直径只能扩大到4倍。
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