、Of all the planets in our own solar system,we are now pretty certain the Earth is the only
Of alltheplanetsinourown solar system,we arenowprettycertaintheEarthisthe onlyoneonwhichlifecansurvive.这句话里面的ON 怎么单独放在那里 放在WHICH前面啊 我该怎么理解这个ON啊?这位置我搞不懂怎么翻译