This card defines the word "rival", listing it as a noun (competitor), adjective (competitive), and verb (to compete).
该卡片定义了"rival"一词，将其列为名词（竞争对手）、形容词（竞争的）和动词（竞争）。
| Front | rival |
|---|---|
| Back | n.竞争对手 adj.竞争的 v.竞争 |
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