the existence of solution

• 解的存在性

the existence of solution的用法和样例：

例句

1. He proved the existence of parallel lines.
   他证明了平行线的存在性。
2. The existence of random attractors for multi-value random semiflows was studied.
   摘要该文研究多值随机半流的随机吸引子的存在性。