added burden

• 额外负担

added burden的用法和样例：

例句

1. The best tax would be one that generates the least excess burden.
   最好的税应该产生最小的额外负担。
2. I loved the Rolex, and appreciated its fine workmanship, but it had become an unnecessary burden.
   我喜欢劳力士，承认它有良好的做工，但它现在毕竟不再是我的额外负担了。