牛肉饼的重量在45克时，其边际效益达到最大值的翻译：When weighing 45 grams of beef cake, its marginal benefit maximum 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

Weight of beef patties at 45 grams, the maximum marginal benefit

When weighing 45 grams of beef cake, its marginal benefit maximum

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Beef cake in weight of 45 grams, its marginal effectiveness at the maximum

When weighing 45 grams of beef cake, its marginal benefit maximum