《自然》（20221020出版）一周论文导读
Abstract:Of more than a thousand known cataclysmic variables ， where a white dwarf is accreting from a hydrogen-rich star， only a dozen have orbital periods below 75 minutes. One way to achieve these short periods requires the donor star to have undergone substantial nuclear evolution before interacting with the white dwarf， and it is expected that these objects will transition to helium accretion. These transitional CVs have been proposed as progenitors of helium CVs. However， no known transitional CV is expected to reach an orbital period short enough to account for most of the helium CV population， leaving the role of this evolutionary pathway unclear. Here we report observations of ZTF J1813+4251， a 51-minute-orbital-period， fully eclipsing binary system consisting of a star with a temperature comparable to that of the Sun but a density 100 times greater owing to its helium-rich composition， accreting onto a white dwarf. Phase-resolved spectra， multi-band light curves and the broadband spectral energy distribution allow us to obtain precise and robust constraints on the masses， radii and temperatures of both components. Evolutionary modelling shows that ZTF J1813+4251 is destined to become a helium CV binary， reaching an orbital period under 20 minutes， rendering ZTF J1813+4251 a previously missing link between helium CV binaries and hydrogen-rich CVs.
一周双语新闻热词汇总（4.16-22）
请看例句:China's first-quarter GDP expanded 4.8 percent compared to a year ago amid pressures from a more complicated and grimmer international environment and a resurgent of COVID-19 cases， the National Bureau of Statistics said on Monday.国家统计局4月18日发布数据，初步核算，一季度，中国国内生产总值同比增长4.8%。
肉锥属多肉植物的生态系统服务功能｜“肉锥清网行动”科普
该属植物主要分布在非洲南部和西南部干旱地区，有着独特的半球形和柱形体型的“体型”，它们通常生长在南非的沙质和石质的土壤中。根据最新的植物分类学数据，Conophytum属包含了约200个已知物种。
《科学》（20181221出版）一周论文导读
ISSUE6421《科学》2018年12月21日第6421期362卷植物学BotanyAhiddencradleofplantevolutioninPermiantropicallowlands二叠纪赤道低地植物进化的隐藏摇篮作者。
青岛遭大规模白泥蚂入侵，原存于日本海等地，为啥跑到我国沿海？
近日，海星和白泥蚂大举入侵青岛事件 渔民为了这事愁死了。当地渔民发现，胶州湾又出现了大量的海星，而且这些海星还在吃着渔民辛苦养殖的蛤蜊。
中国绿发会国际交流与合作工作简介
中国生物多样性保护与绿色发展基金会是经国务院批准成立全国性公益公募基金会，全国性一级学会，长期致力于生物多样性保护与绿色发展事业。
双语｜地球并非人类独享，我们要做自然的长期守护者
Humanity has only one home – the Earth. But it isn't exclusively ours. We share our beautiful planet – this stunning blue marble – with millions of other species and our existence is intertwined with theirs. For the sake of all living things， we must ensure a healthy and thriving planet.
新研究：保护生物多样性首先要说服人类！
【中国绿发会讯】目前，全球生物多样性正以前所未有的速度丧失，物种灭绝速度也空前加速。生物多样性丧失的主要原因包括土地和海洋利用的改变、生物资源利用、气候变化、污染以及外来物种入侵等。
南非再次抓获盗采野生肉锥嫌疑人 | 志愿者向肉锥清网行动反映
据身在南非的志愿者给“肉锥清网行动”发来的最新线索，就在刚刚过去的4月中旬初，南非警方再次抓获了盗采野生肉锥花属植物的犯罪嫌疑人。
Chongming Dongtan: Feathers in the Wetlands | SFC Markets and Finance
By Yinong Li, SFC, 21st Century Business HeraldFebruary 2 is World Wetlands Day, a day dedicated to raising awareness about the importance o