n.其它选择；备选方案
名词alternative的复数形式.
They resisted the introduction of impractical alternatives. 他们抵制采取那个不切实际的备选方案。
It also includes a consideration of possible alternatives, such as a concrete gravity dam or an earth-fill embankment dam. 还要考虑到可能的备选方案，比如是选择混凝土重力坝还是选择填土筑堤大坝。
