exposure中等

Throughout the trip, Jackson juggled multiple cameras and plate sizes using the “collodion process” that required him to coat the plates with a chemical mixture, then expose them and develop the resulting images with a portable darkroom. The crude technique required educated guesses on exposure times, and involved heavy, awkward equipment — several men had to assist in its transportation. Despite these challenges, Jackson captured dozens of striking photos, ranging from majestic images like his now-famous snapshot of Old Faithful, to casual portraits of expedition members at the camp. While veterans of previous expeditions wrote at length about stunning trail sights, these vivid photographs were another thing entirely.

在整个旅途中，杰克逊使用“火棉胶工艺”同时摆弄多台相机和多种尺寸的底片，这种工艺要求他先给底片涂上一层化学混合物，然后曝光，再用便携式暗室冲洗出影像。这种简陋的技术需要凭经验推测曝光时间，而且所用设备笨重难使——需要好几个人协助搬运。尽管困难重重，杰克逊还是拍下了几十张引人注目的照片，从他那张如今已闻名于世的老忠实泉快照这样的壮丽画面，到营地里考察队员的随意肖像，不一而足。以往考察的老手们曾长篇累牍地描写沿途的壮丽景色，而这些生动的照片则完全是另一回事。

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19世纪40年代和50年代，即摄影的早期，曝光时间之长是出了名的：银版照相法（在镀银铜板上成像）可能需要几分钟才能完成，拍摄对象一挪动位置或调整四肢，图像就会模糊。

But exposure times were much quicker by the 1880s, and the introduction of the Box Brownie and other portable cameras meant that, though slow by today’s digital standards, the exposure was almost instantaneous.

但到了19世纪80年代，曝光时间已经快多了，而布朗尼盒式相机和其他便携式相机的问世意味着，尽管按今天的数码标准来看仍然很慢，但曝光几乎是瞬间完成的。

But exposure times were much quicker by the 1880s, and the introduction of the Box Brownie and other portable cameras meant that, though slow by today’s digital standards, the exposure was almost instantaneous.

但到了19世纪80年代，曝光时间已经快多了，而布朗尼盒式相机和其他便携式相机的问世意味着，尽管按今天的数码标准来看仍然很慢，但曝光几乎是瞬间完成的。

They show effects of different exposure times.

它们展示了不同曝光时间的效果。

Now the researchers are probing the specific effects of teaching style, teaching assistants’ eating habits and students’ video exposure.

现在，研究人员正在探究教学风格、助教的饮食习惯以及学生观看视频的情况各自产生的具体影响。

Scientists have found that exposure [to] this hormone puts us in a trusting [mood]: In a Swiss study, researchers sprayed oxytocin into the noses of half the subjects; those subjects were ready to lend significantly higher amounts of money to strangers than were their [counterparts] who inhaled something else.

科学家发现，接触{{8}}这种激素会让我们处于一种信任的{{9}}之中：在瑞士的一项研究中，研究人员将催产素喷入一半受试者的鼻腔；与吸入其他物质的{{10}}相比，这些受试者愿意借给陌生人的钱要多得多。

protect kids from exposure to wild fantasies.

保护孩子免受荒诞幻想的影响。

However, Cortina said, early exposure is beneficial.

不过，科尔蒂纳说，早接触是有益的。

Cortina holds that early exposure to computer science makes it easier to ____

科尔蒂纳认为，早接触计算机科学会让人更容易____

The situation presents a delicate balance between leveraging AI for its productivity gains and risking confidential data exposure.

这种情况需要在利用人工智能提高效率与冒机密数据泄露风险之间取得微妙的平衡。

The UK’s exposure to fluctuating wood prices is a result of ____

英国受到木材价格波动的影响是由于____

Exposure of a mass-market secret.

揭露一个大众市场的秘密。