英語(yǔ)翻譯
Since the sea covers the greater part of the earth's surface,it is quite reasonable to regard the sea floor as the basic form of the crust of the earth,with,superimposed upon,it the continents,together with the islands and other features of the oceans.
參考譯文：既然海洋覆蓋著地球的大部分表面,因此完全有理由把海床看作地殼的基本模殼,上面附加著大陸以及島嶼和海洋的其他形態(tài).
with,superimposed upon,it the continents,together with the islands and other features of the oceans.1.with后為啥加個(gè)逗號(hào) 這樣是?2.superimposed upon又是個(gè)逗號(hào)?3.it the continents 如果去掉這個(gè)it反倒好理解 或者去掉the 這個(gè)it the continents有這種用法么.