It is imagined by many that the operations of the common mind can be by no means compared with these processes, and that they have to be required by a sort of special training.
【解析】
It is imagined by many //that the operations of the common mind can be by no means compared with these processes, //and that they have to be acquired by a sort of special training.
主句：it is imagined，其中it為形式主語(yǔ)，而that引導的 that the operations... compared with these processes和that they have to ... special training是并列的主語(yǔ)從句，為真正的主語(yǔ)。原文中有三個(gè)被動(dòng)語(yǔ)態(tài)is imagined，be compared和be required，譯成漢語(yǔ)都變成了主動(dòng)表達："認為"、"相比"和"掌握"。具體為：
(1)It is imagined by many 此處是"It+被動(dòng)語(yǔ)態(tài)+that"形式的處理，譯為"很多人認為"。
(2)that the operations of the common mind can be by no means compared with these processes, 此處所用的是譯成漢語(yǔ)主動(dòng)句的處理方法，并保存原文主語(yǔ)譯為"普通人的思維活動(dòng)根本無(wú)法與這些思維過(guò)程(科學(xué)家的思維過(guò)程)相比"。
(3)and that they have to be required by a sort of special training 此處所用的是譯成漢語(yǔ)被動(dòng)句的處理方法，譯為"認為這些思維過(guò)程是必須由某種專(zhuān)門(mén)訓練才能掌握"。
