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- 那只帆船正乘风笔直疾驶。
The yacht was scudding along before the wind.
- 这条路笔直有好几英里长。
The road ran straight for several miles.
- 如果灯杆不是笔直的，我就感到烦恼。
It annoys me if a lamppost is not bolt upright.
- 这个老妇人挺着身子，笔直地坐在椅子里。
The old lady was sitting upright in her chair, stiff as a poker.
- 她昂着头，把背挺得笔直。
She held her head erect and her back straight.
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