This private school offers an international curriculum, but the tuition is quite expensive.

private 是形容词，意思是"私人的、私有的"，与 public（公共的）相对。 school 是名词，意思是"学校"。 private school 指由私人或非政府机构运营的学校，通常需要支付学费，中文称为"私立学校"。