New words:

major [ˈmeɪdʒər]
adj.严重;主要的;重要的;大的
n.少校;专业课;主修课程
v.主修;专攻


Sample Sentences:

Mathematics is my major.
He's a major in the US army.
A major problem is the absence of water.
She majored in Maths and Physics at university.
They suffered some major setbacks during the fighting.


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