词根词缀:centro-, centr-, centri-, kentro-
【来源及含义】Greek > Latin: center; middle point, mid point; focus, focal point, focalize; zero in on
【相关描述】This element originally meant "sharp point, goad" or "spur".
【同源单词】acentric, acentric, acrocentric, allocentric, ambulatory surgery center, amphicentric
词根词缀:uni-, un-
【来源及含义】Latin: one, single; a word element for number 1
【同源单词】disunion, disunionism, disunionist, disunite, disunited, disuniter