低温保持器

例句：

1. 1. This refrigerator has a low-temperature preservation function.
   这台冰箱具有低温保鲜功能。
2. 2. The scientist used the low-temperature preservation device to preserve the samples.
   科学家使用低温保存设备来保存样本。
3. 3. In order to keep food fresh, we need to use a low-temperature preservation device.
   为了保持食物新鲜，我们需要使用低温保存设备。