n. reflection ; reflexion ; invagination
adj. reflexed
misc. reflexio
本文研究了自由翼的翼型的几何特征，表明它们的中弧线都具有反折的特点；
The geometry of airfoils, which is proper for the free-wings, was numerically investigated and the results indicated that the airfoils must be featured by the S-shaped camber.
一年生草本茎外倾或直立，30-90厘米高，分枝，具棱，具稀的反折的皮刺沿着棱。
Herbs annual. Stems decumbent or erect, 30-90 cm tall, branched, angulate , with sparse retrorse prickles along angles.
焦点之间的中点为中心。椭圆的一个特性是：连自一个焦点的直线边界反折会通过另一个焦点。
The flatter the ellipse, the farther apart are the foci, and the farther each focus is from the center .
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