1.旅伴；伴侣；陪伴a person or an animal that travels with you or spends a lot of time with you
travelling companions旅伴
Fear was the hostages' constant companion.人质一直都感到恐惧不安。
2.（爱好、志趣等相投的）伙伴，同伴a person who has similar tastes, interests, etc. to your own and whose company you enjoy
She was a charming dinner companion.与她同桌进餐使人感到十分高兴。
His younger brother is not much of a companion for him.他的弟弟和他志趣不太相投。
They're drinking companions(= they go out drinking together) .他们是酒友。
3.同甘共苦的伙伴a person who shares in your work, pleasures, sadness, etc.
We became companions in misfortune.我们成了患难之交。
4.陪护（通常受雇照料老人或病人）a person, usually a woman, employed to live with and help sb, especially sb old or ill/sick
5.成对的物品之一；一副物品中的一个one of a pair of things that go together or can be used together
A companion volume is soon to be published.这卷书的姊妹篇即将问世。
6.（用于书名）指南，手册used in book titles to describe a book giving useful facts and information on a particular subject
A Companion to French Literature《法国文学指南》
She was no longer wrestling with the grief, but could sit down with it as a lasting companion and make it a sharer in her thoughts.
她不再和悲伤纠缠不休，而是和它并排坐下来，像是相识已久的伙伴，与之分享她的所思、所想。
DOTS is feasible everywhere because the companion is usually not a community health worker at all, but a family member or neighbor.
直接观察治疗在任何地方都是可行的因为，伙伴完全不是团体的卫生工作者，除了家庭成员或邻居。
and yet no secret, such as the physician fancied must exist there, ever stole out of the minister's consciousness into his companion's ear.
然而医生想象中肯定存在的那种隐私，却始终没有溜出牧师的意识传进他的同伴的耳中。
If you've got a companion, take a rope with you and a couple of pitons for your belays, but nothing else.
如果你有同伴，多带一条绳和一些岩钉架确保系统，其他东西就不用了。
Annie Sullivan, was an American teacher best known as the instructor and companion of Helen Keller.
安妮·莎利文是一位美国教师，因其和海伦·凯勒亦师亦友的关系而闻名于世。
For most people, dispensing with a personal dresser and an official companion for a foreign trip does not count as the height of austerity.
对大部分人来说，在一次出国的行程中减少个私人服装师或者官方陪同难以提升到简朴的高度。
I find that you have to keep up your appearance physically, even if you just want a companion or someone to ask you to dinner.
因此我觉得你得让你的外表好看。哪怕是为了找个朋友或者想让谁请你吃上一顿。
I knew how much her children, John and Caroline, and her companion, Maurice Tempelsman, would miss her.
我知道她的孩子约翰和卡洛琳，以及她的伴侣毛里斯.坦普斯曼将会多么怀念她。
I'd expected to be punished, but I didn't realize that Hattie's anger would be such a formidable companion.
我知道自己会受到惩罚，但是没有意识到海蒂的怒气会是这样一个令人生畏的伙伴。
Captain Nemo and his muscular companion were already stretched out in this clear crystal, setting us a fine nap time example.
尼摩船长和他的壮健同伴，早就躺在清澈的水晶体中，先给我们作出睡眠的榜样了。
Now Kirkpatrick is part of the WISE science team, ready to search again for any signs of a companion to our Sun.
现在克里克帕特里克是本次任务团队的一份子了，已经为再次搜寻太阳的伴星做好了准备。
I began to think he was going to be a good companion to have when we were at sea.
我开始想他也许是一个不错的海上伙伴。
and that sense of fear, of furtive unrest, might in some manner unforeseen become a living companion, as it had been before.
还有那种恐惧，那种诡秘的不宁之感，也许还会就像过去那样，无法预见，与我们如影随形。
The Small Magellanic Cloud, and its companion galaxy the Large Magellanic Cloud, are the two galaxies where this type of study is possible.
小麦哲伦星云和其伴生的大麦哲伦星云，是在可能进行这种研究的两个星系。
He pointed and nodded across the street to his own house, as if inducing his companion to come in.
他从对街指着他的屋子点了点头，似乎在邀请他的同伴进来。
and, after a little consultation, one and all tumbled down the fore companion thinking, no doubt, to take us on the rear.
他们大吃一惊，商量了一会儿之后，一起从前升降口冲下去，无疑是想从后面袭击我们。
The maiden raised her eyes and suffered them to linger upon her companion with a bashful and admiring gaze.
少女抬眼顾盼，羞答答情怯怯，秋波在同伴身上流连忘返。
Now I understand that he had a companion within his heart during the travels and he was not afraid of any trouble.
现在我才知道，他是两个人在旅游，他真的不怕辛苦，因为他“心苦”。
By the word of the Lord one of the sons of the prophets said to his companion, "Strike me with your weapon, " but the man refused.
有先知的一个门徒奉耶和华的命对他的同伴说：“你打我吧！”那人不肯打他。
His companion, who did not identify herself, said he was "very tired" .
他的同事说他甚至都没有认出她来，他非常疲惫。
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