(located) at; (to be) in; to exist; in the middle of doing sth; (indicating an action in progress)[cedict]
一定
yī dìngㄧ ㄉㄧㄥˋ
surely; certainly; necessarily; fixed; a certain (extent etc); given; particular[cedict]
程度
chéng dùㄔㄥˊ ㄉㄨˋ
degree (level or extent); level[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]
刺激
cì jīㄘˋ ㄐㄧ
to provoke; to irritate; to upset; to stimulate[cedict]