词汇点睛
stress n.精神压力，紧张
[观察] Be able to work under stress.能够承受工作压力。We worked on pronunciation, stress and intonation.我们学习了发音、重读和语调。
She stressed that she wasn't going to help.她强调说她不会帮忙的。when you are stressed, relax yourself.
当你有压力的时候，放松一下。

[探究] stress作名词时，意为“精神压力_”;作动词时，意为“强调;使紧张，加压力于;用重音读”。
[拓展] stressed为形容词，意为“紧张的,有压力的”。