冷冻、冷藏起来可以保存三个月以上。
Refrigerate or freeze any that you plan to keep for more than three months.
六个月以上不满一年的，按一年计算；
Any period of above six months but less than one year shall be deemed as one year.
六个月以上的长时间紧张感可能恶化成广泛性焦虑症。
Prolonged stress, for over six months, may worsen and become generalized anxiety.
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