Photosynthesis is the process by which green plants convert sunlight into energy. It is the foundation of nearly all life on Earth.段落1：光合作用是绿色植物将阳光转化为能量的过程，它是地球上几乎所有生命的基础。
Urbanization has transformed the way people live and work. Today, more than half of the world's population lives in cities.段落2：城市化改变了人们生活和工作的方式，如今全球一半以上的人口居住在城市。
Biodiversity refers to the variety of life in a particular ecosystem. The loss of biodiversity threatens food security and human health.段落3：生物多样性指特定生态系统中生命的多样性，它的丧失威胁着粮食安全和人类健康。
Inflation reduces the purchasing power of money over time. Central banks try to keep inflation low and stable.段落4：通货膨胀会逐渐降低货币的购买力，各国央行力图将通胀维持在较低且稳定的水平。
Renewable energy sources, such as wind and solar power, produce electricity without burning fossil fuels.段落5：风能、太阳能等可再生能源无需燃烧化石燃料即可发电。
Good infrastructure, including roads, bridges and railways, is essential for economic development.段落6：良好的基础设施——包括公路、桥梁和铁路——对经济发展至关重要。
Sustainable agriculture aims to produce food without damaging the environment for future generations.段落7：可持续农业的目标是在不破坏后代生存环境的前提下生产粮食。
The human brain contains about eighty-six billion neurons. It consumes around twenty percent of the body's energy.段落8：人脑约有 860 亿个神经元，消耗全身约 20% 的能量。
Global consumption of resources has doubled in the past thirty years. Experts warn this trend cannot continue.段落9：过去三十年全球资源消耗翻了一番，专家警告这一趋势不可持续。
Public libraries offer free access to books, computers and quiet study spaces for everyone in the community.段落10：公共图书馆为社区所有人提供免费的图书、电脑和安静的学习空间。
Honeybees play a vital role in agriculture by pollinating crops. Their decline would seriously affect the food supply.段落11：蜜蜂通过为作物授粉在农业中扮演关键角色，其数量下降将严重影响粮食供应。
Learning a second language improves memory, attention and problem-solving skills at any age.段落12：学习第二语言能在任何年龄提升记忆力、注意力和解决问题的能力。
The Great Barrier Reef is the largest living structure on Earth. It can even be seen from outer space.段落13：大堡礁是地球上最大的生命结构体，甚至能从外太空看到。
Regular physical activity reduces the risk of heart disease and improves mental health.段落14：规律运动可降低心脏病风险并改善心理健康。
Online education allows students in remote areas to attend lectures from top universities.段落15：在线教育让偏远地区的学生也能听到顶尖大学的课程。
Water covers about seventy percent of the Earth's surface, but only a tiny fraction is drinkable.段落16：水覆盖地球表面约 70%，但可饮用的只占极小一部分。