on; on top; upon; first (of two parts); previous or last (week etc); upper; higher; above; previous; to climb; to go into; above; to go up; to attend (class or university); third tone of putonghua[cedict]
代数
dài shùㄉㄞˋ ㄕㄨˋ
algebra[cedict]
课时
kè shíㄎㄜˋ ㄕˊ
class; period[cedict]
我
wǒㄨㄛˇ
I; me; my[cedict]
坐
zuòㄗㄨㄛˋ
to sit; to take a seat; to take (a bus, airplane etc)[cedict]