博茨瓦纳调查至少275头大象的神秘死亡 A dead elephant is seen in this undated handout image in Okavango Delta, Botswana, May-June 2020. 2020年5月至6月，博茨瓦纳奥卡万戈三角洲，一头死大象出现在这张未注明日期的讲义图片上。 GABORONE – Botswana is investigating a growing number of unexplained deaths of elephants, having confirmed 275 had died, up from 1……Read More
作者： Wenliang Zhu
Coronavirus: How much does your boss need to know about you?
冠状病毒：你的老板需要了解你多少？ Ford is using thermal scanning to check workers’ temperatures before they enter company sites 福特公司正在使用热扫描技术在工人进入公司工地前检查他们的体温 As more people start to return to their workplaces, many employers are introducing new ways to check up on their staff, from thermal scanners to wristb……Read More
Lesson2 Part4
Liquefaction Coal can also be converted into liquid fuels like gasoline or diesel by several different processes. 煤还可以通过几种不同的方式转化为汽油柴油等液体燃料。 The Fischer-Tropsch process of indirect synthesis of liquid hydrocarbons was used in Nazi Germany for many years and is today used by Sasol in South Africa. 间接……Read More
Coronavirus: Immunity may be more widespread than tests suggest
冠状病毒：免疫力可能比测试的所表明的更加广泛 People testing negative for coronavirus antibodies may still have some immunity, a study has suggested. 研究表明，对冠状病毒抗体检测呈阴性的人可能仍具有一定的免疫力。 For every person testing positive for antibodies, two were found to have specific T-cells which identify and destroy infected cells. 对于每个抗体检测……Read More
Lesson2 Part3
Metallurgic coke is used as a fuel and as a reducing agent in smelting iron ore in a blast furnace. Coke from coal is grey, hard and porous, and has a heating value of 29.6 MJ/kg. 冶金焦在高炉炼铁时用作燃料和还原剂。煤制焦炭呈灰色、坚硬、多孔，热值为29.6MJ/Kg。 Byproducts of this conversion of coal to coke include coal tar, ammonia, l……Read More
Finding the ‘invisible’ millions who are not on maps
寻找不在地图上的隐形人 There are often no maps of rural areas of Rwanda 卢旺达的农村地区往往没有地图 “There are about two billion people in the world who don’t appear on a proper map,” says Ivan Gayton from the charity Humanitarian OpenStreetMap. “世界上大约有20亿人没有出现在正确的地图上，”慈善机构“人道主义开放式街道地图”的伊万·盖顿说。 “It&……Read More
Lesson2 Part2
Bituminous coal—a dense coal, usually black, sometimes dark brown, often with well-defined bands of bright and dull material, used primarily as fuel in steam-electric power generation, with substantial quantities also used for heat arid power applications in manufacturing and to make coke. 烟煤—一种致密的煤……Read More
Core of a gas planet seen for the first time
首次看到气体星球的核心 The planetary core orbits very close to its parent star 行星核心的轨道非常接近其母恒星 Astronomers have found a previously unseen type of object circling a distant star. 天文学家发现了一种以前看不见的围绕着一颗遥远恒星的天体。 It could be the core of a gas world like Jupiter, offering an unprecedented glimpse inside one of these ……Read More
Lesson2 Part1
Types and Application of coal Coal is a fossil fuel formed in swamp ecosystems where plant remains were saved by water and mud from oxidization and biodegradation. 煤是沼泽生态系统中形成的化石燃料，在沼泽生态系统中，植物残骸在水和泥浆的氧化和生物降解作用中被保存下来。 Coal is a readily combustible black or brownish-black rock. It is a sedimentary roc……Read More
A ‘mass experiment’ for the climate
气候的大规模试验 Has the pandemic helped individuals and leaders get any closer to tackling the environmental crisis? 大流行是否帮助个人和领导者进一步解决环境危机？ “I was so worried about the dangers of going too far,” says Sally Capp, Lord Mayor of Melbourne, when she now thinks about her pre-pandemic leadership on the environm……Read More