Sacroiliac
a. 骶髂的\\nn. 骶髂關節病
??? 情景例句
I have a question.
我有一個問題。
How did you recognize him?
你是如何認識他的？
The intellectual, who is working on some abstruse problem, has everything coordinated and organized for the matter in hand.
一個專心鉆研某個復雜問題的知識分子，為了搞好手頭的研究，要把一切都協調一致，組織周密。