(located) at; (to be) in; to exist; in the middle of doing sth; (indicating an action in progress)[cedict]
电话
diàn huàㄉㄧㄢˋ ㄏㄨㄚˋ
telephone; phone call[cedict]
上
shàngㄕㄤˋ
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]
谈
tánㄊㄢˊ
to speak; to talk; to converse; to chat; to discuss; surname Tan[cedict]
过
guòㄍㄨㄛˋ
(experienced action marker); to cross; to go over; to pass (time); to celebrate (a holiday); to live; to get along; excessively; too-; surname Guo[cedict]