Everyone thinks it is our nature to do so. But much of our thinking, left to itself, is biased, distorted, partial, uninformed or down-right prejudiced.请问left to itself作什么成份且该如何理解？
看到一句话:Oxford
university,it's also one of the oldest universities with historian tracing
instruction as far back as 11th century.我理解这句话几个问题:1.我查词典里介词with的词条解释似乎都不适合这里，请教这里with的含义，请写出中文和英文的含义...
Shielded by third-party payers from the cost of our care, we demand everything that can possibly be done for us, even if it's useless.老师我觉得shielded在这句话中翻译不通，第三方不是提供资金吗？与保护有什么关系呢？
Their younger peers had a bit more luck, beginning their careers in years when tightening labour markets had pushed up wages. Until, that is, the covid-19 pandemic upended many of their lives. 请问一下老师，这个that is在这里是干啥的？
rob Europe of the lead its scientists could take in feeding the planet这句话中in feeding the planet是修饰the lead its scientists
could take .还是与 its scientists could take一起并列修饰the lead？
句子结构分析，句子翻译: At present rates of demand, the world has enough oil in known and economically viable reserves to last for more than 40 years, enough gas for more than 60 years and enough coal for more than 230 years.
shady zone beneath the leaves of the taller trees where beetles，snakes，and frogs crawl over ferns and vines.翻译是不是在高大树木的叶子下是甲虫、蛇和青蛙在蕨类植物和藤类植物上爬行的荫凉地带，是不是先翻译where后面定语修饰的。
... his brain, as I do, does something with his hands, as when I make a piece of furniture, friends give high praise.主句为friend give high praise, 此句中when引导时间状语，as引导方式状语， as when后面这个算什么从句呢？方式状语？