seed ion
种子离子
以上为机器翻译结果，长、整句建议使用 人工翻译 。
To establish a meadow, it usually takes 10 to 20 pounds of wildflower and grass seed for each acre, says Howard Bright, president of Ion Exchange, a specialty nursery in Harpers Ferry, Iowa.
WSJ: Meadows Instead of Lawns Are in Fashion in Residential Landscaping
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