dì / yī / shì / zuì / cháng / jiàn / de / xù / shù / biǎo / shì / shùn / xù / zhōng / de / dì / yī / gè

“第一”是最常见的序数，表示顺序中的第一个。

“First” is the most common ordinal number and indicates the first position in an order.