But what is thus made plain to our apprehensions in the case of a foreign language is partially true even with the tongue we learned in childhood.
这种在外语中显而易见的困难,即使对于我们从小学习的母语,也部分存在。
— Robert Louis Stevenson · Virginibus Puerisque, and Other Papers · Virginibus Puerisque · IV · Truth of Intercourse —