以上来源于: WordNet
N any small bird of the family Todidae of the Caribbean, having a red-and-green plumage and long straight bill: order Coraciiformes (kingfishers, etc) 翡翠科鸟类
With mixed feelings he said good - bye to Dy . Archibald.
他怀着矛盾的心情告别了阿奇博尔德大夫。
dxdy Last time I told you if we have dx dy we could switch it to r dr d theta.
上一次课提到,如果给出,我们可以把它转换为rdrdθ
I am really impressed with dy Jironal and the true tension he brings to the story.
我真的很慨叹于迪·吉罗纳以及他给故事带来的真正张力。
You all know that when you do dy/dx, you're not supposed to cancel that d.
你们都知道 当你算dy/dx时,你不能把d约掉
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