Inside wedge construction contains a polyurethane heel support stabilizer.

建筑内部包含一个楔子聚氨酯脚后跟支撑稳定。

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youdao

Heels not only have to be the right height but in the right position: not too far back, but under the centre of the heel so they support your weight properly, following the natural line of your body.

鞋跟不仅要有一个合适的高度，也需要在正确的位置上：不能太靠后，要在脚后跟的中心，这样的鞋跟才能沿着你的身体曲线有效地支持你的体重。

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McCain has a long list of endorsements, but immigration continues to be his Achilles' heel because of his support in the Senate of unpopular reform legislation.

CNN: GOP race still wide open in South Carolina