These can start 'spot' fires many kilometres ahead of the main fire front.

这些烟尘可以在离火灾现场若干公里处燃起星星之火。

OK, let's recap the rest of the vocabulary, starting with freckle – a small brown spot on someone's skin.

好的，让我们回顾一下剩下的词汇，从雀斑开始——人皮肤上的褐色小斑点。

Reese says she has been drinking bottled water instead of well water ever since she started spotting dead fish in the creek following the derailment.

里斯说，自从脱轨事件发生后她开始在小溪里发现死鱼，此后她就一直喝瓶装水而不是井水。