人类的进步取决于变化和自由流动的想法是否口语还是书面语。
Human progress depends upon the change and free flow of ideas whether in spoken or written form.
词是个表达单位，不管是在口语还是在书面语中，说母语的人对词有种普遍的直觉识别能力。
Word is a unit of expression that has universal intuitive recognition by native-speakers, whether it is expressed in spoken or written form.
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