obstinate与stubborn这两个形容词均可表示“固执的，顽固的”之意。
obstinate : 指无理地固执已见或听不进他人忠告、意见等顽固性格。
- He can be very obstinate when he wants to be!
他的犟劲儿一上来，简直执拗得要命！ - her obstinate refusal to comply with their request
她对他们的请求坚辞不从
stubborn : 用于褒义指坚定不移，执意顽强；用于贬义指固执已见，侧重生性固执。
- He was too stubborn to admit that he was wrong.
他死不认错。 - She can be as stubborn as a mule.
她可以倔得像头骡子。 - stubborn pride
死要面子 - a stubborn resistance to change
顽固抵制变革 - a stubborn refusal to listen
硬是不听
