era

n.纪元，时代，年代

equi-, equidistant, equilateral, equilibrium, equine, equinoctial, equinox, equip, equip with, equipment, equipoise, equitable, equitably, equity, equivalence, equivalent, equivocal, equivocate, equivocation, ER, eradicate, eradication, eradicator, erasability, erase, eraser, erasure, ere, erect, erectile, erection, erectness, erector, erg, ergo, ergonomics, ermine, erode, eroded, erogenous,