词根：-tract-

【词根含义】：拉,引

【词根来源】：来源于拉丁语动词traho, trahere, traxi, tractus(拉)。

【同源单词】：abstract, abstraction, attract, attraction, attractive

前缀：abs-

【词根含义】：分离,脱离

【词根来源】：ab-的变体,只用在c和t前。

【同源单词】：abstain, abstention, abstinence, abstract, abstraction

词根词缀：a-, ab-, abs-

【来源及含义】Latin: prefix; from, away, away from

【相关描述】This prefix is normally used with elements of Latin and French origins (abs- usually joins elements beginning with c, q, or t).

The form ab- is regularly used before all vowels and h; and it becomes a- before the consonants m, p, and v. The prefix apo- has similar meanings.

This list is a very small sample of the multitudes of a-, ab-, abs- prefixes that are available in dictionaries and those in this unit are only meant to present a few examples.

【同源单词】abampere, abampere centimeter squared, abampere per square centimeter, abarticular, abarticulation, abbreviate

词根词缀：tra-, tract-, trac-, -tractive, -traction, -tracting, treat-, trai-

【来源及含义】Latin: drag, draw together; a drawing out or pulling

【同源单词】abstract, abstract, abstracted, abstractedly, abstractedness, abstraction