straight A成绩最优秀的straightadj.直的；坦率的；正直的；准的；连续的；异性恋的adv.笔直地；直接；坦率地；连续不断地n.直的东西；传统的人；异性恋者straight shootn.直路(最直截了当的手续)straight grade直坡度straighttongue直纹凸榫straight track直向股道straight lined直线的straight-armvt.伸直双臂以防敌人缠近身上straight yield[经] 即时收益率, 直接收益率straight gyrus直回straight brace直支撑straight wells直井

1. He dove straight into the new book and read all night.
   他一头钻进那本新书里，读了个通宵。
2. In drilling an oil well, mud is used to lubricate the cutting bit.
   钻油井时，泥浆被用来润滑钻头。