The batteries are designed to be leak-proof and hermeticallysealed.
这些电池的设计防渗漏，且密封性强。
《柯林斯英汉双解大词典》
2
One answer is to use the energy to compress air, which can be squirrelled away in hermeticallysealed underground caverns.
解决这一问题的方法之一是利用风能来压缩空气，使空气进入气密的地下储气站。
3
Fringe benefits here include a cigar club, the fastest lifts in the world, and the chance to snap peregrine falcons as they migrate past your no doubt hermeticallysealed expanse of window.