题目内容

____: vt. use a lot of time and effort trying to get (sth. such as work or money) 追寻

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____: (used to make a suggestion) 为什么不

____: n. the process of trying to achieve sth. 追求,寻求

____: ad. In the end, especially after a long time or a lot of effort 最终;终于

____: n. the rate at which a sound wave, light wave, or radio wave moves up and down 震动频率

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