gōng / chéng / shī / yòng / lìng / yì / zhǒng / fāng / fǎ / yàn / suàn / jié / guǒ / yǐ / miǎn / chū / cuò

工程师用另一种方法验算结果，以免出错。

The engineer verified the result using another method to avoid errors.