1·Objective: To observe the effect of preoperative intestinal preparation disusing oral antibiotic in colorectal cancer.
目的：观察大肠癌术前未口服抗生素行肠道准备的效果。
2·When we talk about recycle and reuse of oil extraction wastewater, we mean to make the original disusing or discharging wastewater become useful water resource after treated by some process.
采油废水的资源化就是将原本废弃或排放的水经过相应处理成为可利用的水资源。