discard policy

例句：

1. 1. The old clothes need to be discarded after a few washes.
   旧衣服洗几次后需要丢弃。
2. 2.The company decided to discard the outdated technology and invest in newer ones.
   公司决定丢弃过时的技术，转而投资新的技术。
3. 3.The old books were discarded as they were no longer useful.
   旧书被丢弃，因为它们已经没有用了。