1 sentence

1. 老师说，番茄和番薯中的“番”字说明它们来自海外。

   lǎo​shī shuō, fān​qié hé fān​shǔ zhōng de“ fān” zì shuō​míng tā​men lái​zì hǎi​wài.

   The teacher said that the character 'fan' in the Chinese words for tomato and sweet potato indicates that they originated from overseas.

   Source: Dong Chinese Dictionary