7、ageconquergraduallyenrichespeciallyrapidlyspellingsettle/settler重点短语playarole(in)playapart(in)evenifbebasedonfromoneplacetoanotherthesame…as…suchasmakeuseofatpresentnolongercomeuptothenumberof 重点句子1. However,theymaynotbeabletounderstandeverything.(然而,他们可能不是什么都懂。)2. This