existence question的用法和樣例：
例句
- Thus educational problems consist of the problem of human being and existence.
人的存有與存在問(wèn)題恰恰構成教育的問(wèn)題核心。 - The problem of the blending of the quadratic and thrice algebraic surfaces is transformed into the existence of the nonzero solution of some homogeneous linear equations.
摘要將一個(gè)二次曲面和一個(gè)三次曲面沿平面接口的拼接曲面的存在性轉化為求三個(gè)多項式理想交的成員問(wèn)題，進(jìn)而化為一組齊次線(xiàn)性方程組的非零解的存在問(wèn)題。
