sealed pad的用法和样例：
例句
- Payne has designed a new tear-tape system for opening hermetically sealed packs, which combines easy opening with airtight pack freshness.
佩恩设计了一个新的催泪开放磁带系统的密封包装，方便开放相结合的密封包装保鲜。 - Those sealed glossy packs of cheeses and lunchmeat on your grocer's shelf can provide a particularly friendly home for nasty bugs that cause food poisoning, new research shows.
最新研究表明，食品店货架上摆放的密封包装的奶酪和午餐肉，能够为一种致病菌提供特别有利的繁殖环境。
