extra space的用法和樣例：
例句
- Supinators also tend to have wide feet and need to look for a shoe that provides extra room in the forefoot and toe box.
高足弓腳傾向於擁有寬的腳面，需要在前腳和腳趾部分能提供額外空間的鞋。 - It recasts particles as one-dimensional strings, or filaments of energy, which play around in tiny tangles of extra spatial dimensions.
弦論將粒子視為一維的弦或是細絲狀的能量，並只活動在額外空間維度的微小纏結之中。
