Crystals having this property are said to be doubly refracting , or birefringent.具有这种性质的晶体叫做双折射晶体.In pregnancy a high fibre diet is doubly important...在孕期,含高纤维素的饮食越发地重要。She now felt doubly guilty; she had embarrassed Fra...
Pigeons fluttered in and out, cooing gently.鸽子们低声咕咕地叫着，扑扇着翅膀飞进飞出。the sound of pigeons cooing鸽子咕咕的叫声The boy frightened away the pigeons from the roof.那男孩把屋顶上的鸽子吓飞了....
They were in a real jam, Bob thought glumly.他们确实遇上麻烦了，鲍勃闷闷不乐地想。His room was jam-packed with fruit, flowers, gifts etc.他的房间里堆满了水果、鲜花及礼品等。Did she do things like bottling fruit or making jam?她干过将水果装瓶或做果酱之类的活计吗？...