美国园艺疗法协会 AHTA
美国园艺治疗协会 AHTA ; American Horticultural Therapy Association
美国国家园艺协会 National Gardening Association
根据美国园艺治疗协会 AHTA ; American Horticultural Therapy Association
美国园艺协会的作家Charlie Nardozzi说，芹菜生长的最好温度是低于二十一摄氏度。
Charlie Nardozzi is a writer for the National Gardening Association in the United States. He says parsley grows best when temperatures are under twenty-one degrees Celsius.
无论是保尔还是美国园艺协会的研究都没有详细说明这样一个问题：在你的菜园能长出东西之前，你得在上面投入多少。
Neither Mr. Ball nor the National Garden Association study focus on how much you may have to sink into your garden before you can grow anything.
这项发现被美国园艺学协会日报所登载。
The findings are described in the Journal of the American Society for Horticultural Science.
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