yù / dào / bù / dìng / xíng / shí / bù / néng / zhí / jiē / dài / rù / shù / zhí / ér / yào / jìn / yī / bù / huà / jiǎn

遇到不定形时，不能直接代入数值，而要进一步化简。

When encountering an indeterminate form, you cannot substitute the values directly and must simplify further.