①If that is not rarefied enough, imagine if one of the fellow passengers were Jeff Bezos, gazing down onto a planet that is spanned by his digital conglomerate, Amazon, and of which he is the richest inhabitant.
请问老师这里imagine if中的if是条件状从吧，译为假如。不是宾从做是不是讲吧。
②Yet dismissing his space quest as a combination of mid-life crisis and money to burn would be underestimating the missionary zeal that drives Mr Bezos, “Invent Wander”, a collection of 23 years of letters to Amazon shareholders and other musings, illustrates.
学生括起来的部分，and which,这里的and应该是连接两个定从，先行词zeal。但这里的and可省略吗？
感谢老师为我解答!
①If that is not rarefied enough, imagine if one of the fellow passengers were Jeff Bezos, gazing down onto a planet that is spanned by his digital conglomerate, Amazon, and of which he is the richest inhabitant.
——imagine 的宾语，是动名词 gazing down onto...，而 if one of the fellow passengers were Jeff Bezos, 表示条件，且用了虚拟语气。
②Yet dismissing his space quest as a combination of mid-life crisis and money to burn would be underestimating the missionary zeal that drives Mr Bezos, and which “Invent Wander”, a collection of 23 years of letters to Amazon shareholders and other musings, illustrates.
——that 和 which 都是关系代词，它们一同的先行词是 zeal（热情），由于是并列式定语从句，and 不可省略。假如省略了and，那样，which 则指整个前文或其中一部分。这里，which 作从句 illustrates 的宾语。
