单词：retroflexion
[医] 后屈
n an articulatory gesture made by turning the tip of the tongue back against the roof of the mouth
n the act of bending backward
retroflexion的用法和样例：
例句
- The retroflexion of the lineshapes is illustrated by combining the polarization theory and the balance probe theory, which is in good accordance with the experiment.通过结合偏振理论与平衡探测理论，对线型翻转现象进行了解释，理论与实验符合得很好。
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