Of course, I need to concede that my collection of 'Smiling Victorians' makes up only a tiny percentage of the vast catalogue of photographic portraiture created between 1840 and 1900, the majority of which show sitters posing miserably and stiffly in front of painted backdrops, or staring absently into the middle distance.
当然，我必须承认，我收集的‘微笑的维多利亚人’只占1840年至1900年间创作的大量摄影作品中的一小部分，大多数照片中的人物则是在画布背景前痛苦而僵硬地摆姿势，或者茫然地盯着远处。
During the 1840s and 1850s, in the early days of photography, exposure times were notoriously long: the daguerreotype photographic method (producing an image on a silvered copper plate) could take several minutes to complete, resulting in blurred images as sitters shifted position or adjusted their limbs.
在1840年代和1850年代，摄影的早期阶段，曝光时间非常长：达盖尔银版摄影法（在镀银铜板上成像）可能需要几分钟才能完成，导致人物在移动或调整姿势时产生模糊的图像。
Even Mark Twain, a man who enjoyed a hearty laugh, said that when it came to photographic portraits there could be "nothing more damning than a silly, foolish smile fixed forever".
即使是喜欢开怀大笑的马克·吐温，也说过在拍摄肖像照时，"没有什么比永恒定格的傻笑和愚蠢笑容更令人不齿的了。"
例句取自历年考研英语真题，翻译为机器生成，仅供学习参考。