我花了大概两三周的时间阅读和做全面的研究，然后很快就写完了……一共用了大约四周时间。
Well, I spend about two or three weeks reading and doing general research and then I dashed the writing off very quickty…so about four weeks in all.
我花了大概两三周的时间阅读和做全面的研究，然后很快就写完了……一共用了大约四周时间。
Well, I spend about two or three weeks reading and doing general research and then I dashed the writing off very quickty…so about four weeks in all.
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