Both strains quickly invaded local hospitals when needle sharing and other unhealthy practices ensured the rapid spreading of the infection by bringing people into contact with contaminated body fluids.
出自-2013年6月聽力原文
By contacting contaminated body fluids
出自-2013年6月聽力原文
I've often heard that medieval glass windows are thicker at the bottom because glass flows like a fluid.
2018年12月六級真題（第二套）聽力 Section A
Pipitone says if you increase protein, you also have to increase your fluid intake.