express
1.to show or make known a feeling, an opinion, etc. by words, looks or actions:
[VN] Teachers have expressed concern about the emphasis on testing. ◆ His views have been expressed in numerous speeches.
◆ to express fears / doubts / reservations
◆ to express interest / regret / surprise
◆ [V wh-] Words cannot express how pleased I am.
2. ~ yourself to speak, write or communicate in some other way what you think or feel:
[VN] Teenagers often have difficulty expressing themselves.
◆ Perhaps I have not expressed myself very well.
◆ She expresses herself most fully in her paintings.
◆ (formal) [VN-ADJ] They expressed themselves delighted.
convey
~ sth (to sb) to make ideas, feelings, etc. known to sb
Synonym: COMMUNICATE
[VN] Colours like red convey a sense of energy and strength.
◆ (formal) Please convey my apologies to your wife.
◆ [V wh-] He tried desperately to convey how urgent the situation was.
◆ [V that] She did not wish to convey that they were all at fault.
express注重的是表达出来你的意思
convey则是注重传达给他人某种意思