tiān / qì / biàn / lěng / hòu / mā / ma / gěi / wǒ / mǎi / le / yí / tào / bǎo / nuǎn / nèi / yī天气变冷后,妈妈给我买了一套保暖内衣。After the weather turned cold, Mom bought me a set of thermal underwear.