what is the difference between ......

1. 第一句 "An architect is someone who design buildings" 是一句完整句子 (complete sentence), 主語是 "an architech" 餘下的文字是用來說明它的. is 是這句的動詞. 譯為中文是
建築師是負責建房子的人. (意思完整)
2. 第二句 "an architect who designs buildings " 不是一句完整句子, 未有動詞. 主語仍是 "an architect", 但如下的文字 (who......) 只是用來修飾這個主語, 這個主語有何動作就未寫出來. 譯為中文是
負責建房的的建築師 ........
若加上動詞成為完整句子:
An architect who designs buildings is respected by society. / 負責建房子的建築師獲得眾人愛戴
SOMEONE譯為中文就是 "......的人". SOMEONE WHO DESIGNS BUILDING 就是 "設計房子的人"

'an architect is someone who designs buildings'
This is the explanation of an architect.『一個工程師是一個設計建築物的人。』





subject


verb


object



an architect


is


someone who designs buildings
(is a clause to modify someone)

"an architect who designs buildings" is to emphasize the work of an architect, this is not a sentence,it's just a subject or an object.
『一個設計建築物的工程師。』





a subject or an object



an architect who designs buildings
(is a clause to modify an architect)