N-COUNT Your instep is the middle part of your foot, where it arches upward. 脚背
It can help you relax when you keep insteps downwards when the whole body touches the ground.
另外，五体投地的时候，脚背朝下，脚心朝上，有助于整个身体的放松。
The Buddha's ears are 6.72m long, insteps 8.5m broad, and a picnic could be conducted on the nail of his big toe, which is 1.5m long.
佛像的耳朵有6.72米长，脚背宽8.5米。其脚指甲有1.5米长，在上面野餐都“面对竞争越来越激烈的中超联赛绰绰有余。
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