parabolic crack的用法和樣例：
例句
- The problem of an elastic plane having symmetric parabolic crack is discussed.
摘要研究含軸對稱拋物線曲裂紋平面彈性問題。 - Classical complex variable method is followed, but a new conformal mapping formula is proposed so that the exterior part of the parabolic crack is mapped into a unit circle.
採用了傳統的複變函數保角映射法，給出了一個新的保角變換公式，從而將拋物線曲裂紋外的區域映射到一個複平面的單位圓內。
