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 stroke直线球straight barrel平辊身straight cooler带冷机straight collet直夹套straight stitch短直线针绣straight boiler平顶锅炉straight strain拉伸应变,拉伸滑移straight cement纯水泥straight B/L收货人记名提单straight length直线长度