名词短语
中文翻译：幼苗硬化
同义词：
['幼苗硬化，苗木硬化，苗木硬化例句：1. The young tree is hardening its roots in the soil.（这棵年轻的树正在土壤中硬化它的根。）']
例句：
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1. The young tree is hardening its roots in the soil.
这棵年轻的树正在土壤中硬化它的根。
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2.The nursery has a large selection of hardening seedlings for sale.
苗圃有大量的苗木供出售。
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3. During the hardening process, the plant's growth rate slows down.
在硬化过程中，植物的生长速度减慢。