Probably because of relatively weak thigh muscles and a lack of foot support.

可能是由于相对羸弱的大腿肌肉以及缺乏脚的支撑。

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Make sure you have the right kind of shoes for your foot type ( review our tips on shoe shopping). Consider buying a commercially made foot support in the footcare section of your drug store.

穿一双适合你脚型的鞋，考虑在你药店脚病专区买个脚支撑器。

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By Lagrange dynamic equations, the dynamic model of the simplified biped is given respectively in the period of single-foot support and double - foot support, and this model is easy to control.

运用拉格朗日动力学方程对简化的机器人模型分别在单、双脚支撑期进行了动力学建模，得到了一个便于控制的动力学模型。

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Their 160-foot aluminum masts could barely support the loads placed on them, and the sails put thousands of pounds of tension on lines that had to be hauled by hand.

FORBES: Magazine Article

The Park Place search begins a day after the NYPD announced that Boeing officials had determined that the 5-foot-tall, 3-foot-wide wreckage is a support piece attached to the wing of an aircraft, and not a piece of landing gear as originally believed.

WSJ: 9/11 Remains Sought in Debris Behind New York City Building

Indeed, it's the support at the ball of the foot that gave my pair their distinct feel.

FORBES: The Sole of Stefano Bemer