It is simple pleasures, such as a walk on a sunny day, which have a cumulative effect on our mood.
诸如在晴朗的日子散步这样简朴的乐趣对我们的情绪有累积性益处。
Scientists claim to have identified chemicals produced by certain plants which have powerful cancer-fighting properties.
科学家们声称已经发现某些植物产生的化学物质有强大的抗癌功能。
A country's capacity to produce wealth depends upon many factors, most of which have an effect on one another.
一个国家创造财富的能力取决于许多因素，其中大多数因素相互影响。
They even say that large wild animals which have not lived in the UK should be helped to return and live wild.
他们甚至说应该帮助那些没有在英国生活过的大型野生动物回归野外生活。
It holds six language families, two of which have only one remaining language, and almost all of the languages here are endangered.
它有六个语系，其中两个只剩下一种语言，几乎这里所有的语言都濒临灭绝。
Elephants, which have no predators, must roam widely to get their daily ration of about 300 kilograms (660 pounds) of grass, leaves, and twig.
没有天敌的大象必须在广袤的大地上四处漫游，才能获得每日约300公斤（合660磅）的草、树叶及树的口粮。
Private courier companies, which have more dollars to spend, use their expertise in logistics to help revitalize damaged areas after a disaster.
私人快递公司可支配的资金更多，它们利用自身在物流方面的专业技术来助力灾区的重振。
Mass market paperbacks, which have been declining for years anyway, will probably disappear, as will hardbacks for mysteries, thrillers, "romance fiction," etc.
无论如何，大众市场的平装书已经衰落多年，且可能会消失，就像神秘小说、惊悚小说、“浪漫小说”等的精装书一样。
This all amounts to heightened activity and noise levels, which have the potential to be particularly serious for children experiencing auditory function deficit.
所有这一切都意味着活动量和噪音水平增加，这对有听觉功能缺陷的儿童来说有更加严重的潜在影响。
Adams took a succession of jobs which have stood him in good stead.
亚当斯做了一连串对他很有利的工作。
Some of it has to do with recent stage musicals, which have been very, very stylized.
其中的一些与最近的舞台音乐剧有关，是极度非写实的。
My grandparents like stories which have happy endings.
我的爷爷奶奶喜欢结局美满的故事。
Gather some leaves which have an interesting texture and shape.
采集一些带有有趣的纹理和形状的叶子。
China is one of the countries which have the largest number of rivers.
中国是世界上河流最多的国家之一。
There are at least two classes of these receptors, which have been designated A1 and A2.
这些受体至少有两类，分别被命名为A1和A2。
In front of the two trees which have been destroyed in the typhoon sit a group of young kids.
被台风摧毁的两棵树前面，坐着一群小孩。
How many kinds of animals are mentioned in the news story which have been reintroduced to the wild?
新闻报道中提到了多少种动物已经被重新放归野外？
There are some buildings which have historical significance to the locals or to the wider community.
有些建筑对当地人或更广泛的社区具有历史意义。
The combustion of larger molecules, which have multiple carbon-carbon bonds, involves a more complex series of reactions.
具有多重碳-碳键的大分子的燃烧涉及到一系列更复杂的反应。
If the speculators are not to blame, what about the oil companies, which have failed to increase output in spite of record profits?
如果投机者不应受到谴责，那么那些尽管利润创下纪录，但仍未提高产量的石油公司呢？
Not to be left behind are the disease-spreading pests, about 100 species of which have become immune to a variety of insecticides now in use.
传播疾病的害虫也不甘落后，其中约有100种对目前使用的各种杀虫剂有了免疫力。
Great writers are those who not only have great thoughts but also express these thoughts in words which have powerful effects on our minds and feelings.
伟大的作家不仅有伟大的思想，而且能够用文字表达这些思想，他们的文字对我们的思想和感情有强大的影响。
The scheme was overtaken by the economic crisis, and the stranglehold of BAA and BA, both of which have a lot invested in Heathrow, has prevented its revival.
该计划被经济危机所取代，英国机场管理局和英国航空公司对希思罗机场进行了大量投资，这两家公司的严格控制阻碍了希思罗机场的复兴。
The environmental approach hypothesizes that states appear in certain environmental settings, settings which have a severe population problem or a shortage of agricultural land.
环境法假设国家是在特定的环境中出现的，这些环境存在严重的人口问题或农业用地短缺。
The clay deposits are scattered all over, in ancient volcanic surfaces and heavily cratered highland regions, some of which have apparently been exposed by erosion only recently.
粘土沉积分布在古代的火山表面和坑坑洼洼的高原地区，其中一些显然是最近才由于侵蚀而暴露出来的。
Even utility companies, which have long viewed batteries and alternative forms of energy as a threat, are learning to embrace the technologies as enabling rather than disrupting.
就连长期以来将电池和替代能源视为威胁的公用事业公司，也开始学着接受这种技术，认为它们是有利的，而不是破坏性的。
The notion is that people have failed to detect the massive changes which have happened in the ocean because they have been looking back only a relatively short time into the past.
这种观点认为，人们之所以没有察觉到海洋中发生的巨大变化，是因为他们用于回顾过去的时间相对较短。
Saline soils, which have high concentrations of sodium chloride and other salts, limit plant growth, and research continues to focus on developing salt-tolerant varieties of agricultural crops.
盐碱地含有高浓度的氯化钠和其他盐类，限制了植物的生长，研究继续集中于开发耐盐的农作物品种。
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