dì / di / dì / yī / cì / qí / píng / héng / chē / shí / bà / ba / yì / zhí / zài / páng / biān / bǎo / hù / tā

弟弟第一次骑平衡车时，爸爸一直在旁边保护他。

When my younger brother rode a balance bike for the first time, Dad stayed beside him to protect him.