keen [ki:n]
a.热心的；激烈的
例句1, She is a keen learner, always eager to acquire new knowledge.
她是一个热心的学习者，总是渴望获取新知识。
例句2, The debate between the two candidates grew increasingly keen as the election approached.
随着选举的临近，两位候选人之间的辩论变得越来越激烈。

keep [ki:p]
vi.保持；坚持
例句1, She always keeps her promises, no matter how d

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