crucial role
definitions
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A position, function, or part that is extremely important, essential, or decisive to the success, functioning, or outcome of a situation, process, or system.th: บทบาทสำคัญ
examples
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The Great Migration plays a crucial role in the ecosystem.
การอพยพครั้งใหญ่มีบทบาทสำคัญในระบบนิเวศ