serration

n. 锯齿状,锯齿状突起

serial, serial number, serialization, serialisation, serialize, serialise, serially, seriatim, series, serif, serio-comic, serious, seriously, seriousness, serjeant-at-arms, sermon, sermonize, sermonise, serous, serpent, serpentine, serrate, serrated, serried, serum, servant, serve, serve as, serve one's turn, serve right, server, service, service area, service break, service charge, service flat, service road, service station, serviceable, serviceably, serviceman, services, servicewoman,