WHOs new naming system for coronavirus variants uses Greek alphabet 世界卫生组织采用希腊字母为新冠病毒变体命名 The World Health Organization said on Monday that it has assigned new labels to key coronavirus variants so

How to write a letter of resignation如何写辞职信Writing a letter of resignation can be difficult, depending on the circumstances. For one thing, its hard to strike just the right tone. Even if youre leaving...

Plastics pose threat to human health, report shows 据报道，塑料会对人类健康造成威胁 Plastics contain and leach hazardous chemicals, including endocrine-disrupting chemicals (EDCs) that threaten human health. An autho...

The science behind snowflakes 雪花背后的科学 A snowflake is a small weather feature that can pack a big punch. 作为一种气候特点，雪花是微不足道的。但是，雪花背后的科学却会让你大吃一惊。 Many are m

Covid-19 is now on every continent as Antarctica records its first outbreak 南极洲出现首个新冠病例-现在各大洲都有Covid-19 Antarctica has recorded its first Covid-19 case after 36 people tested positive on a research ba...

图片来源：路透社 After spending weeks poring over data provided by Pfizer, government scientists on Tuesday acknowledged in a new document that they believe there is ample evidence that the first COVID-19 vac...