specific 強調內容明確，毫不抽象、籠統(tǒng)。
express 語氣較強，較正式，指不但清楚明確，而且含有直截了當和有力等的意思。
例句：
It was important for children to learn to express themselves clearly.
孩子學會清楚地表達自己很重要。
Many artists express their world view in their work.
很多藝術家通過作品表達自己對世界的看法。
I would like to express my warmest thanks to the doctors.
我想向醫(yī)生們表達我最由衷的感謝。