胎儿式睡姿的人往往比较害羞、敏感，而仰卧在床上、双臂靠在身体两侧的士兵式睡姿的人则比较安静，保守。
Fetal sleepers tend to be shy and sensitive while people who assume the soldier position, flat on their back with arms at their sides, are quiet and reserved.
蝶泳：一种泳姿。即采用俯卧姿势，双臂同时在水面之上前挥划水，结合身体做海豚式打水。
Butterfly: a stroke made in the prone position where both arms are lifted simultaneously out of the water and flung forward, in combination with the dolphin kick.
对齿轮传动式、双臂曲柄摇杆式、液压式翻板机的运动状态进行了较深入的分析。
Motion state of the plate turnover machine of gear drive type, double-arm crank rocker type and hydraulic type has been analyzed deeply.
好，让我们回到四脚板凳式，双手双脚用力下压，双臂后推，膝盖抬离地面，脚跟尽量压向地面。
Well, let us return to the bench-style legs, hands feet under hard pressure, pushed his arms and knees off the ground, heel to the ground as far as possible pressure.
好，让我们回到四脚板凳式，双手双脚用力下压，双臂后推，膝盖抬离地面，脚跟尽量压向地面。
Well, let us return to the bench-style legs, hands feet under hard pressure, pushed his arms and knees off the ground, heel to the ground as far as possible pressure.
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