They say flip-flops force people to change the way they walk so that when taking a stride they put pressure on the outside of their foot, rather than their heel, causing long-term damage.
专家说，穿人字拖强行改变了人们走路的方式。 走路时，压力集中到了脚掌外侧，而不是脚跟，这会造成慢性损伤。
As a team they're strong on attack but they have a weak defence that might prove to be their Achilles' heel.
作为一个团队，他们在进攻上很强势，但防守方面却相对薄弱，就像阿喀琉斯的脚踵一样。
On June 2nd South Carolina joined a growing number of states trying to bring their growing prison population-and the associated costs-to heel by changing the way criminals are sentenced.
6月2日，南卡州同越来越多州一道，尝试通过改变判罚囚犯的方式来降低囚犯人数—以及由此连带的成本¬—来寻求出路。
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