1 sentence

1. 这道数学题涉及两个元，需要通过代入法来求得结果。

   zhè dào shù​xué tí shè​jí liǎng gè yuán, xū​yào tōng​guò dài​rù fǎ lái qiú​dé jié​guǒ.

   This math problem involves two variables and requires the substitution method to find the result.

   Source: Dong Chinese Dictionary