translation.en: But one of the things that we found was when we did side-by-side comparisons with wood charcoal, it didn't burn as long. And the briquettes crumbled a little bit and we lost energy as they fell apart as they were cooking.
translation.zh: 但是我们发现 和一般木炭比 炭砖不持久，一下就碎了 于是热量就分散开来，导致烧饭的时候很费力