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单词 pin down
释义 pin downphr v [t] 1. [ pin sb down] to make someone decide something, or tell you what their decision is 使[某人]决定[明确表态]:◇i couldn't pin him down to a definite date. 我无法使他定下一个明确日期。 2. [ pin sth down] to discover exactly what something is 发现,找到:◇scientists believe they have pinned down the cause of the illness. 科学家相信他们已发现了这种病的病因。
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