同根派生 英汉例句Alder trees belong to the birch family.赤杨属于桦木科。However, the influence of red alder on growth and competition in the mixed stands still ranks first at this moment.虽然如此，但就目前而言，台湾赤杨对于林分林木生长竞争之影响仍大于台湾杉。