您要查找的是不是：
- 作不定主语或不定宾语时,只可用certain与之连用With 'it' as an indefinite subject or object only certain can be used it
- 你可能用一个拥有固定选项集的下拉式列表框来设计Remedy。You can design Remedy with a fixed set of options in a dropdown list.
- should和would用于从句中的be certain,be determined,insist等词语之后Should and would are used in clauses after be certain,be determined,insist,etc
- Drug，medicine和remedy通常意思一样。Drug这个词由荷兰词droog变来，意思是弄干。这一术语开始使用，很可能是因为多数早期药物是用晒干植物制成的。"The terms drug, medicine, and remedy generally mean the same thing. The word drug comes from the Dutch word droog, which means to dry. The term probably came into use because most early drugs were made from dried plants."
