名词
中文翻译：固定产量
同义词：
['perennial crop', 'permanent crop']
例句：
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1.The farmer has a standing crop of wheat that he harvests every year.
这位农民每年都有一批固定的小麦收获量。
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2. The standing crop of crops in the field is enough to feed the entire village.
田地里现有的作物足以养活整个村庄。
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3. The government has been working on a plan to increase the standing crop of renewable energy sources.
政府一直在努力制定一个计划，以增加可再生能源的储备量。