例句與造句

1. Catheterization , preparation of abdominal skin , and passage of a nasogastric ( ng ) tube may be done in the emergency department or operating room ( or )
   插管、腹部皮膚準(zhǔn)備及鼻胃管可在急診室或手術(shù)室進(jìn)行。
2. It's difficult to find operating room (or) in a sentence. 用operating room (or)造句挺難的