reference surface center的用法和樣例：
例句
- The portions of the crack near the saw cut and along the edges are closed in relation to the center of the crack face.
接近鋸切口和沿著邊緣的裂紋部分相對於裂紋面中心而肯定是閉合的。 - The temperature of body centerline has been computed by reference temperature and experience formulas and boundary layer transition has been considered.
主要採用參考溫度法和經驗公式法，並考慮了邊界層轉捩，對飛行器迎風面中心線上的溫度分佈進行了計算。
