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Never, Rarely, Seldom + Đảo ngữ

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The EconomistAcademic Writing — Formal Analysis (2023)

Rarely has a single scientific discovery transformed our fundamental understanding of the entire universe so profoundly and so quickly. Never before in modern history have so many diverse countries collaborated together so effectively on a single global climate initiative. Seldom does one encounter such genuine dedication and passion in modern business environments where profit often comes first. Nowhere else in the world can you find such an extraordinary concentration of brilliant talent in one place as in this city. Only on very rare occasions does the review committee approve proposals submitted for publication without requesting substantial revisions first.