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更新日期:2026-08-14
on the threshold of在……之起点;在……之开端:A scientist points out humbly that,although he has studied this subject for years,he is only on the threshold of it.一位科学家谦逊地指出,他虽然已经研究这个科目多年,但他仅不过是处于该学科的入门阶段。