zhè zhǒng / yǒu jī fēn zǐ / zài / cháng wēn / xià / hěn / bù / wěn dìng / xū yào / dī wēn / bǎo cún

这种有机分子在常温下很不稳定，需要低温保存。

This organic molecule is very unstable at room temperature and needs to be stored at low temperature.