The rectum and colon must be completely empty before surgery .
手术前病人的结肠和直肠必须排空。
It is especially good on the difference between the colon and the semicolon .
它很好地区分了冒号和分号。
Searching bloomberg 's database , I found seven : the argentine peso , the icelandic krona , the costa rican colon , the pakistani rupee , the nigerian naira , the vietnamese dong and the iranian rial .