班里三分之一是女生。
Bān lǐ sān fēn zhī yí shì nǚshēng.
English
A third of the class are girls.
of (literary possessive particle)
(possessive particle, literary equivalent of 的); him; her
Every character draws itself stroke by stroke, then hands you the brush to trace it yourself.
Nice writing!
班里三分之一是女生。
Bān lǐ sān fēn zhī yí shì nǚshēng.
A third of the class are girls.
这是原因之一。
Zhè shì yuányīn zhī yī.
This is one of the reasons.
Chinese words snap together like bricks. Every word below shares a character with this one, so you are already halfway to knowing it.