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- Before Top Dad Center 上死点前
- The trailing edge of the fourth notch, which causes the pulse, is four degrees before top dead center (TDC) of the corresponding piston. 产生的脉冲的第四凹槽的后缘，位于相应的活塞在前上死点（TDC）4度的位置的位置上。
- Dad talked short with me before I went to bed. 爸爸在我睡觉前和我简短地谈了几句。
- We began to pant before we reached the top of hill. 我们在到达山顶之前已经在喘气了。
- 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。
- Before he reaches the top, he is already sweating and panting. 他还没有爬到山顶就已经浑身出汗，气喘吁吁了。
- Dad talk short with me before I go to bed. 爸爸在我睡觉前和我简短地谈了几句。
- Dad wants me to go in before it gets dark. 爸爸要我天黑前进屋。
- 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。
- Before he reached the top, he was already sweating and panting. 他还没有爬到山顶就已经浑身出汗，气喘吁吁了。
- My dad was a Merry Prankster before that. 我老爸之前是个梅利普斯特。
- 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。
