1、 The historian searched for primary sources of information about the past、歷史學(xué)家尋找有關(guān)過(guò)去的原始資料來(lái)源。
2、 A primary cause of Tom's failure is his laziness、懶惰是湯姆失敗的主要原因之一。
3、 The primary meaning of the word isn't used now, but you can look it up in a big dictionary、這個(gè)字的本義現在不用了,但你可以在大字典里查到。
4、 A primary school is the first school you go to、小學(xué)是你上的第一個(gè)學(xué)校。