stricter certification requirements
📖 释义
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更严格的认证要求
💬 例句
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The government implemented stricter certification requirements for pilots to ensure safety.
政府实施了更严格的飞行员认证要求以确保安全。
The government implemented stricter certification requirements for pilots to ensure safety.
政府实施了更严格的飞行员认证要求以确保安全。