贵 dear, expensive, costly 便宜 cheap, 大量 many, much, a lot of, lots of, loads of 包含,由……组成 consist of, be composed of, comprise 组成 constitute, compose, comprise 例如 for example, for instance 顺便提一句 by the way, incidentally 勤奋的,刻苦的 industrious, diligent