otherwise当“否则”解的时候是连接性状语。在句首时通常有逗号和句子其它部分隔开，但也有不用逗号的情况。

本句中otherwise是differently的意思，是方式状语（即修饰性状语）修饰stated，而且是限制性状语，故不能用逗号。

All the photographs in this book,unless stated otherwise,date from the 1950s.

这句话怎么理解？otherwise 的前面是不是应该有个逗号？怎么理解这个otherwise？谢谢！！

以上句子应该改为“一般过去式”而不是一般现在时态

All the photographs in this book,unless stated otherwise,dated from the 1950s.

date from追溯到;开始于;始造（或建）于 

（英文解释：If something dates from a particular time, it started or was made at that time.）

All the cupboards and appliances datedfrom the 1950s. 

所有这些橱柜和家用电器都是 20世纪 50 年代的物品。

The present controversy dated from 1986.  

现在的这一争议始于 1986 年。

I received an unsigned letter dated form May 5 th, 1972.  

我接到一封注明1972年5月5日但没属名的信.

unless stated otherwise=除非另有说明，其位置非常灵活，可位于，句首，句中以及句末

unless stated otherwise 为unless +主语+(is/was/were)+stated otherwise 省略简化结构

 otherwise

adv. 否则；另外；别的方式 

adj. 别的，另外的；不同的 

conj. 否则，不然 

Buying credit entitles you to 60 Freedays ( unless stated otherwise ).

通过信用卡购买你可以有60天的免费期.

 Most items are shipped by USPS Priority Mail with delivery confirmation, unless stated otherwise in listing.  

多数项目用USPS与交付确认的快递邮件运输, 除非陈术否则在目录.

All photographs are by the author unless otherwise stated.  

若无特殊说明，所有照片均出自该作者。

Unless otherwise stated, all animations in video format, colour and without dialogue.  

除特别注明外, 所有作品为录像制式 、 彩色及无对白.

References to dollars are to United States dollars, unless otherwise stated.  

除非另有说明,元均表示美元.

 All CDs are original, used, in good condition unless otherwise stated.  

所有CD都是原版, 二手, 但状态良好,否则另行注明.

All hardware and fasteners to be stainless steel unless otherwise stated.  

除特别说明外,所有硬件和紧固零件须用不锈钢铸造.

Note: please fill out this application in Chinese, unless otherwise stated.  

说明: 除非另有标明,请用中文填写本表.

Photographs were taken in Beijing in unless otherwise stated.  

如非说明,这些照片都是于1871年一月至二月间在北京拍摄.

1Unless otherwise stated or agreed upon, all prices are net without commission. 

除非另有规定或经双方同意, 所有价格都是不含佣金的净价.

All quotations are subject to our final confirmation unless otherwise stated.  

所作报价,除特别注明外,须经我方确认后方能生效.

Unless otherwise stated or agreed upon all prices are without any discount.  

除非另有说明或约定,价格一律无折扣.

 T will represent temperature alone in this book unless otherwise stated.  

在本书T将只表示温度,除非另有说明.

Unless otherwise stated, prices below are wholesale.  

除非指定价格, 批发的价格较低.

 The price remains the same unless otherwise stated.  

除非另行通知,否则价格不变.

otherwise

adv. 否则；另外；别的方式 

adj. 别的，另外的；不同的 

conj. 否则，不然 

(1)adv.除此以外；在其他方面

Make a note of the questions you want to ask. You will invariably forget some of them otherwise.

把想提的问题记下来，否则总是会漏掉其中的一些。

I'm lucky that I'm interested in school work, otherwise I'd go mad. 

我很庆幸自己对学习怀有兴趣，不然我会疯掉的。

men who want to provide positive role models for kids who might otherwise be out on the streets. 

想为那些可能会流落街头的孩子树立榜样的人

(2)adv.否则；不然

The decorations for the games have lent a splash of colour to an otherwise drab city. 

为运动会所作的装扮给原本毫无生气的城市增添了一抹亮色。

a blue and gold caravan, slightly travel-stained but otherwise in good condition. 

除了在旅途中弄得有点脏以外，性能良好的蓝金色旅行拖车

(3)adv.与之不同地；相反地

Take approximately 60mg up to four times a day, unless advised otherwise by a doctor. 

每次服用大约60毫克，每天最多4次，或遵医嘱。

There is no way anything would ever happen between us, and believe me I've tried to convince myself otherwise.

相信我，我已经努力试图说服自己我们之间存有希望，但我们真的是绝对不可能的。

All photographs are by the author unless otherwise stated. 

若无特殊说明，所有照片均出自该作者。

(4)adv.以其他方式；用别的方法

The studio could punish its players by keeping them out of work, and otherwise controlling their lives. 

电影公司能通过让艺人坐冷板凳来惩罚他们，并采用其他方式控制他们的生活。

(5)adv.及其他；或相反；或其反面

It was for the police to assess the validity or otherwise of the evidence.

应该由警方来判定证据有效与否。

He didn't want company, talkative or otherwise.

他不想跟人搭伴，不管这个伴儿是否健谈。

I was feeling really ill, mentally and otherwise. 

我觉得身心俱疲。