前腿膝关节弯曲，后腿保持绷直状态，右脚后跟贴紧地面并向下压。

Bend the front knee, keeping the back leg straight, press the right heel down on the floor.

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前腿膝关节弯曲，后腿保持绷直状态，右脚后跟贴紧地面并向下压。

Bend the front knee, keeping the back leg straight, press the right heel down on the floor.

youdao