保存很长时间英文怎么说

在英文中，要表示"保存很长时间"可以使用以下几种表达方式：

"preserve for a long time"
例句：
These pickles can be preserved for a long time in the refrigerator.
The ancient Egyptians were able to preserve their mummies for thousands of years.
"keep for a long time"
例句：
I have kept this photograph for a long time because it brings back good memories.
I keep this old vase in the attic because it has been in my family for generations.
"maintain for a long time"
例句：
The government has worked hard to maintain peace in the region for a long time.
We need to maintain a healthy diet and exercise routine for a long time in order to stay healthy.

这些表达方式的来源都是英文动词"preserve", "keep"和"maintain"的含义。"Preserve"表示"保存，保养"，"keep"表示"保留，保存"，"maintain"表示"维持，保持"。