dahlias的音标？

Dahlias are florescent from July.天竺牡丹七月起开花.The dahlias died back when the frosts came.大丽花霜打后暂时枯萎.At what stage of development should we cut roses, gladioluses, and dahlias?知道对于玫瑰 、 剑兰及天竺牡丹,我们应在甚麽阶段剪下来用....

n.大丽花属( dahlia的名词复数 )...