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C288 · 复杂句（76 课）
Formal conclusions could be established through rigorous exp
Course 288
(难)Formal conclusions could be established through rigorous experiments.
1 句 · 父母与孩子分角色配音
旁白 neutral
Formal conclusions could be established through rigorous experiments
通过严谨的实验可以得出正式的结论
