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The lap strap should go under your belly, across your hips.
安全腰带应该在腹部下，越过臀部
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The tray can be attached to an astronaut's lap by a strap or attached to a wall.
拖盘用一根带子系在宇航员的腿上或者墙上。
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The tray can be attached to an astronaut's lap by a strap or attached to a wall.
拖盘用一根带子系在宇航员的腿上或者墙上。
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