我姑母是我唯一的至親英文怎麼說？

My aunt is my only immediate relative.

他問了我一些有關這個題目的問題英文怎麼說？

He asked me some questions relative to the subject.

表兄弟是旁系親屬英文怎麼說？

A cousin is a collateral relative.

供應是按需求而定的英文怎麼說？

Supply is relative to demand.

他是我的遠房親戚英文怎麼說？

He is my distant relative.

在這個世界上沒有什麼東西是固定不變的;一切都是相對的英文怎麼說？

Nothing's fixed in this world; everything is relative.