impaction怎么读 impaction是什么意思
impaction的英文翻译是什么意思,词典释义与在线翻译
Noun:- the condition of being pressed closely together and firmly fixed
- a disorder in which feces are impacted in the lower colon
- a disorder in which a tooth is so crowded in its socket that it cannot erupt normally
- a sharp collision produced by striking or dashing against something