ask和problem的区别

ask是问或者要求的意思，而problem则是难题的意思，区别可以从以下例子看出：

There is a problem occurring in the factory which I can't fix it, I have to ask my tradesman come over to fix it. 工厂出现难题我无法解决，我不得不要求我的技工过来解决它。