侧面包含四条边：其中两条边与顶面和底面其享，剩下的两条边是缝合边（seam edge），参看之前的讨论。限定侧面的环包含缝合边两次，两个缝合边具有不同的朝向。
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手术后，通常用手术针、缝合线把创口两边固定到一起，这样创口才能愈合，皮肤才能恢复完整。
After surgery, stitches (or sutures) are normally used to hold the two edges of tissue together, so the wound can heal and the skin rejoin.
两边都这样慢慢处理，你几乎可以缝合牙间的缝隙，但也不要让它们完全消失掉了，那又会看起来很不自然。
By working slowly from both sites, you can nearly close the gap between the two teeth, but don't make it disappear completely, that would look again unnatural.
首先，经典黑白相间的足球，由32片五边形和六边形缝合而成，沟槽更深。
To start with, the classic black and white soccer ball, stitched together from 32 panels of pentagons and hexagons, has deeper grooves.
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