back straight
- 直道：在许多赛车项目中，直道是赛道的一部分，参赛者在其中以直线行驶相当长的时间，与弯道相对。这个术语在马术比赛、摩托车比赛和田径比赛中都有使用。
柯林斯英汉双解大词典
back straight
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1.
N a straight part of a circuit, esp of an athletics track or a racecourse, furthest from the finishing point (尤指田径赛道上)远离终点的直道
双语例句原声例句权威例句
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坐着的时候后背要挺直。
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Keep back straight and bend knees.
背要直，只弯两膝。
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She held her head erect and her back straight.
她昂着头，把背挺得笔直。
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Helen looked straight up at the sky as if a lost memory or thought of some kind was coming back to her.
VOA: special.2009.11.08
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And if we do, in fact, hit it with light to get the electrons off, it will go back to the straight up in position, or if it gets knocked hard enough it does that, too.
而且如果我们这么做，事实上，用光轰击它以逐出电子，它就会在原位置沿直线返回，或者如果它被撞击的足够猛烈,也会出现上述现象。
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And many people would look back on Dell and say, "You just went straight up." Well, not exactly.
回头看戴尔的发展历程，很多人会说，你们的业绩直线上涨，其实并不尽然。
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