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1·It is crucial that the upper back and neck are held in an erect position to give support for the head.

重要的是：上背和颈部要挺直以支撑头部，这一点很重要。《柯林斯英汉双解大词典》

2·To lose an upright or erect position suddenly.

突然失去垂直的或笔直的位置。

3·Dorsal position was adopted in the first group and hugged-erect position in the second group.

第一组均采用仰卧位透视，第二组均采用抱立位透视。

4·A special steel spreader beam was used to erect the fabricated cage in its proper position in the roadway structure.

使用一个特制的钢托架来安装预制的锚固横梁的钢筋骨架，使其就位于上部结构内预定的位置上。

5·Taking erect stepped mechanical legs for analytic target, describe the whole coordination about the sport position of shank when walking with mechanical leg.

以机械腿达到直立行走为分析对象，描绘了整个腿部的协调运动。