封存的英文：
mothball

参考例句：

They used heavy lead containers to enclose radioactive substances
他们用厚实的铅质容器封存放射性物质。

I am not sure the situation in China, but it sounds like much cheaper to capture and sequestrate CO2 there.
我不是很清楚中国的情况，但听起来好像在那里捕获和封存二氧化碳的成本非常低。

Many companies are mothballing mines and curtailing exploration to conserve cash as prices tumble.
由于价格暴跌，许多公司封存矿山、减少勘探以保存现金。

mothball是什么意思：
n. 卫生球,保藏
vt. 封存
a. 后备的

These products went directly into mothballs as they rolled off the production line.
这些产品从生产线上一下来就被打入冷宫

Many companies are mothballing mines and curtailing exploration to conserve cash as prices tumble.
由于价格暴跌，许多公司封存矿山、减少勘探以保存现金。