计划是每英亩种植10,000棵树。
The plan was to plant 10,000 trees per ___acre.
这个农场今年目标是每英亩种植500棵树。
The farm aims to plant 500 trees per ___acre this year.
他们在祖传的小块土地上种植了橄榄树。
They planted olive trees on a small ___acre of family land.
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