學科,化學物質前不加the, 且當成單數名詞

literature(文學)

mathematics(數學)

astronomy(天文學)

philosophy(哲學)

medicine(醫學)

economiscs(經濟學)

politics(政治學)

genetics(遺傳學)

oxygen(氧)

nitrogen(氮)

例:

At Williams College,Truman H.Safford,Harvard class of 1854,taught astronomy and mathematics, and was a college librarian.