extrados的读音 extrados中文意思
英音
[eks'treɪdɒs]
美音 [ek'streɪdɒs]
n. 拱背（拱的外缘线）美音 [ek'streɪdɒs]
extrados 用法和例句
- An arch with mutually supporting voussoirs that has a straight horizontal extrados and intrados .
- 有水平拱背和水平的内弧面的互相支撑的拱石的拱。