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- [+letter，parcel] 是寫給某人的to be addressed to sb
- （描寫語言學）通過在已存在的詞或詞根后加上詞綴而得到新詞，例如從sing（唱歌）到singer（歌唱家），從do（做）到undo（不做）(descriptive linguistics) the process whereby new words are formed from existing words or bases by affixation:'singer'from'sing';'undo'from'do'
