The prefix " epi " means " on " , because the chemical switches stick on to genes .
前缀“表观”（epi）的意思是“附于”（on），原因是这些化学开关附于基因之上。
That was lidocaine without epi , right ? Does it matter ?
利多卡因里没加肾上腺素，是吗？有问题吗？
What matters are not picturesque qualities , epi sodes , shades of color , or emotional effects .
重要的不是那些如画般的品质、片段、颜色的明暗、或情绪的影响。
Robert scott , the senior international economist at epi who produced the numbers , concedes that the study in one way might overstate the hit to jobs .
