internal boundary的用法和樣例：
例句
- Text added to the inner boundary of a market analysis shape may be hidden behind the center rectangle.
添加到市場分析形狀內邊界的文本可能會隱藏在中央矩形之後。 - Conservative algorithms for internal interfaces are investigated for simulations of compressible inviscid flows by zonal methods.
本文討論用分區方法計算可壓縮無粘流動的內邊界通量守恆演算法。
