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花剑较轻，有弹性，剑尖为钝角；
The foil is a light, flexible weapon with a blunted point;
youdao
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并证明了相应的钝角原理。
The relevant obtuse Angle principle is proved.
youdao
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形成这种钝角的方法之一是再向后倾斜一点。
One way to create this obtuse Angle is to lean back further.
youdao
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形成这种钝角的方法之一是再向后倾斜一点。
One way to create this obtuse Angle is to lean back further.
youdao