您要查找的是不是：
- drainage before excavation 采前预抽
- It's a good idea to test the drainage before planting your roses. 它'的一个好主意,测试之前排水种植玫瑰。
- Pressure test of through out pigging: inspect pipe deformation and construction quality. Exhaust before water pressure test, drainage before manufacture, dryness and medium isolation. 总通清管试压:检测管线变形、施工质量。水压试验前排气、生产前排水、干燥、介质隔离。
- As a matter of fact, I've never been there before. 事实上我从未到过那儿。
- We started early in order to arrive before dark. 为了在天黑前到达，我们很早就动身了。
- He came to look at the drainage. 他是来检查排水设备的。
- The drainage system has been aged. 排水系统已经老化了。
- The clerk marked up his daybook before going home. 办事员在回家前记好当天的日记帐。
- Let's dunk in the pool before dinner. 我们饭前到池塘里泡一会儿。
- I was inspired to work harder than ever before. 我受激励比以往任何时候都更加努力地工作。
- The fox ran away before the hunter shot it. 那只狐狸在猎人向它射击前跑掉了。
- Let's clean down the board before we paint it. 让我们在上漆以前把这块板洗干净。
- It seemed an eternity before news of his safety reached her. 他平安的消息到达她那里之前，那段时间似乎是无限漫长的。
- Let's collect the sap before its consolidation into a hard mass. 让我们在树液坚固成团之前将之收集起来。
- I was roped in for this excursion before I knew it. 我不知不觉被拉来参加了这次远足旅行。
- I want to catch forty wink before the guest arrive. 我想在客人到达之前，先打个盹儿。
- Never before have I been asked to accept a bribe. 以前我从未被要求接受贿赂。
- I adjure you to tell the truth before this court. 我要求你对本庭说实话。
- It looks as if it will rain before long. 看起来一会儿就要下雨了。
- He let a week go by before answering the letter. 他一周以后才回信。
