| 词汇 | harden it off |
| 释义 | (redirected from harden it off)harden offTo systematically expose a young plant to outdoor conditions so that it adapts well when moved outside permanently. A noun or pronoun can be used between "harden" and "off." That delicate plant won't survive outside unless you harden it off first. harden something offto accustom a young plant to normal weather so it can be moved from a protected environment to the out-of-doors. We put the plants by the open window to harden them off. We hardened off the plants. |
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