relation比relationship多壹層意思親屬家人的意思，其他意思壹樣，甚至有時候，relationship也可以表示親屬的意思
柯林斯英漢雙解大詞典
relation?/r?len/?CET4 TEM4?( relations )
1.
N-COUNT?Relations?between people, groups, or countries are contacts between them and the way in which they behave toward each other. 關系
例：
Greece has established full diplomatic relations with Israel.
希臘已經和以色列建立了全面的外交關系。
2.
→ see also?industrial relations,?public relations,?race relations
3.
N-COUNT?If you talk about the?relation?of?one thing?to?another, you are talking about the ways in which they are connected. 關系
例：
It is a question of the relation of ethics to economics.
這是個道德和經濟之間關系的問題。
4.
N-COUNT?Your?relations?are the members of your family. 親屬
例：
...visits to friends and relations.
…對親友的拜訪。
5.
PHRASE?You can talk about something?in relation to?something else when you want to compare the size, condition, or position of the two things. 與…相比
例：
The money he'd been ordered to pay was minimal in relation to his salary.
他被要求支付的錢與他的薪水相比是少的。
柯林斯英漢雙解大詞典
relationship?/r?len?p/?CET4 TEM4?( relationships )
1.
N-COUNT?The?relationship?between two people or groups is the way in which they feel and behave toward each other. 關系
例：
...the friendly relationship between France and Britain.
…英法間的友好關系。
2.
N-COUNT?A?relationship?is a close friendship between two people, especially one involving romantic or sexual feelings. (尤指愛情或性的) 關系
例：
We had been together for two years, but both of us felt the relationship wasn't really going anywhere.
我們在壹起已經兩年了，但是我們倆都覺得這種關系實在不會有什麽結果。
3.
N-COUNT?The?relationship?between two things is the way in which they are connected. 聯系
例：
A number of small-scale studies have already indicated that there is a relationship between diet and cancer.
壹些小規模的研究已經表明，飲食和癌癥之間有壹種聯系。