mutual, common, joint, reciprocal

形容詞 mutual:

1. common to or shared by two or more parties
   同義詞：common
2. concerning each of two or more persons or things; especially given or done in return
   同義詞：reciprocal

1. Negotiations between unions and management are made more difficult by mutual distrust.
   工會(huì)和資方之間的談判由于互不信任而愈加困難。
2. Other organizations have joined the confederation for mutual benefit.
   其他組織為了共同的利益也加入了這個(gè)聯(lián)盟。
3. The country agreed to confederate with the neighboring country for mutual safety.
   這個(gè)國(guó)家同意為了共同的安全而與鄰國(guó)結(jié)盟。
4. The help is mutual.
   幫助是相互的。
5. My friend and I have mutual enthusiasm for music.
   我和我的朋友對(duì)音樂(lè)有著共同的愛(ài)好。
6. Let's give mutual support and inspiration to each other.
   讓我們互相支持，互相鼓勵(lì)。

mu.tu.al

adj.（形容詞）
Having the same relationship each to the other:
彼此相關(guān)的：相互之間有共同關(guān)系的：
例句：
mutual predators.
彼此相關(guān)的肉食性動(dòng)物

Directed and received in equal amount; reciprocal:
相互的，彼此的：等量指導(dǎo)的或以相等的數(shù)量接受的；互惠的：
例句：
mutual respect.
相互之間的尊敬

Possessed in common:
共同擁有的：
例句：
mutual interests.
共同的利益

Of, relating to, or in the form of mutual insurance.
相互保險(xiǎn)的：相互保險(xiǎn)的，有關(guān)相互保險(xiǎn)的或相互保險(xiǎn)形式的
n.（名詞）
A mutual fund.
信托基金

來(lái)源：
French mutuel
法語(yǔ) mutuel
from Old French
源自 古法語(yǔ)
from Latin môtuus [borrowed] * see mei-
源自 拉丁語(yǔ) môtuus [借] *參見(jiàn) mei-

【引伸】
mu.tual.ity
mu.tually
adv.（副詞）
Mutual is uncontroversially used to describe a reciprocal relationship between two or more things, in which use it can be paraphrased by expressions involvingbetween or each other. Thustheir mutual animosity means .their animosity for each other. or .the animosity between them,. anda mutual defense treaty is one in which each party agrees to come to the defense of the other. Butmutual is also widely used where one might expect .common,. as inThe bill serves the mutual interests of management and labor and particularly in the expressionour mutual friend, which was widespread even before Charles Dickens used it as the title of a novel.Critics have often objected to this use,but it is well established in reputable writing.However,mutual in this latter sense is reserved to describe relations that hold between two or more specific parties and a third person or thing. It cannot be used as a substitute forcommon in the sense .general.:
Mutual 毫無(wú)爭(zhēng)議地被用來(lái)描述兩者或者更多事物之間的相互關(guān)系， 可以用一些包括between 或 each other 的表達(dá)來(lái)解釋。 因此他們相互的敵意 意思為.他們彼此之間產(chǎn)生的敵意.或者.他們之間的敵意.， 相互防御條約 意為一個(gè)政黨同意幫助另一政黨進(jìn)行防御的條約。 但是Mutual 也廣泛地用來(lái)表示.共同的.， 就象在這個(gè)議案滿足勞資雙方的需要。 特別是在短語(yǔ)我們共同的朋友， 甚至在查理·狄更斯把它作為一本小說(shuō)名之前就已經(jīng)廣泛應(yīng)用。評(píng)論家們一直以來(lái)常常反對(duì)這種用法，但是在規(guī)范的寫(xiě)作中它已被完全確定下來(lái)了。但是mutual 后來(lái)產(chǎn)生的意思被用來(lái)描述兩個(gè)或者更多特定元素及物和第三者之間的關(guān)系。 當(dāng)意為.普遍的.時(shí)，它不能代替common 來(lái)表述.總體.的含義：
例句：
English is the common (not mutual ) language of the island.
英語(yǔ)是。（而不用 mutual ） 這個(gè)島的通用語(yǔ)。

例句：
It is commonly (not mutually ) believed that Spanish is an easier language than French.
（而不用 mutually ） 相信西班牙語(yǔ)是一種比法語(yǔ)簡(jiǎn)單的語(yǔ)言