n. 

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decaffeinated,
decaffeinated coffee,
decagon,
decagonal,
decagram,
decagramme,
decagynous,
decahedral,
decahedron,
decahydrate,
相似单词
roke,
rokelax,
Roker,
roko,
rokugomycin,
rolamite,
Roland,
rolandometer,
rolands'cement,
role,