7.【哲】(that which thinks or feels)(思想或感知的)主体(与客体相对)；我；自我
8.【哲】(substance)实体, 主体(与属性相对)
9.【音】(melodic phrase)主题
10.【逻】(term of categorical statement)主概念
11.【逻】(reference of subject term)主词, 主项(主概念所指的人或事物)
12.(motive)动机；原因；缘由
13.to change the subject
(start talking about sth else)改变话题；岔开话题
He tried to change the subject, but she wasn't to be put off.他努力想换个话题, 但她却兴趣正浓。