ประโยคภาษาจีน : 中文句子 |
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rén lèi 人类 lì shǐ shàng 历史上 dào dǐ 到底 fā shēng 发生 guò 过 jǐ cì 几次 jì shù 技术 gé mìng 革命 zhòng shuō bù yī 众说不一 |
| How many times have technological revolutions had in history? Different people have different idea. |