For patterns with a leading minus sign (negative prefix), truncation occurs at the point of a nondigit character, including embedded minus signs.

对于带前置负号(负前缀)的模式，截断发生在非数字字符的点(包括了内嵌的负号)。

youdao

For patterns with a leading minus sign (negative prefix), truncation occurs at the point of a nondigit character, including embedded minus signs.

对于带前置负号(负前缀)的模式，截断发生在非数字字符的点(包括了内嵌的负号)。

youdao