保持头部和上身竖直，你的双足平稳地放在你前方，从而让你的膝部弯过你的脚趾。

Keep your head and body vertical, and your feet firmly on the floor in front of you so your knees bend over your toes.

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结果显示，他们的那段历史是内翻足和脊柱侧弯的家族病史。

It reveals a family history of clubfoot and scoliosis.

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结合某试点工程的要求，进行了冷弯薄壁型钢与混凝土组合节点在低周循环荷载下的足尺模型拟静力试验研究。

Experiment under low cycle loading is presented on the composite joint of cold formed & light guage steel shape and concrete.

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