heel in

My little granddaughter caught her heel in the spokes of her bicycle—it was a very nasty wound.

我小孙女的脚跟夹到自行车的轮辐里了，伤得很严重。

Mechanized maize harvest is the Achilles heel in the completely mechanized maize production and it a major researched area in China's agricultural mechanization.

玉米收获机械化是玉米全程机械化的薄弱环节，也是目前我国农业机械化的主攻方向，各地正在积极采取措施以提高玉米机械化水平。

The results show that the four failure modes were ranked from highest to lowest effect: slip along the foundation, non-uniform distributions of stress, tension crack of the floodgate heel in the upper stream and compression failure of the floodgate toe in the downstream line.

由计算结果看出，水闸闸室沿闸基面滑动为水闸的最主要失效模式，上下游应力不均匀、上游闸踵拉裂、下游闸趾压坏为次要失效模式。

My little granddaughter caught her heel in the spokes of her bicycle — it was a very nasty wound

我小孙女的脚跟夹到自行车的轮辐里了，伤得很严重。

The floodgate may be regarded as a series system with four main failures modes including slip along the foundation, compression failure of the floodgate toe in the downstream line, tension crack of the floodgate heel in the upper stream and non-uniform stress distributions.

软基上的水闸可看成由4种主要失效模式（沿闸基面的滑动、下游闸趾压坏、上游闸踵拉裂和上下游应力不均匀）所组成的串联体系。