Archaeological study of wood charcoal found in hearths dating to the various episodes of occupation indicated that the species use changed in a patterned way.
考古研究发现，在壁炉中发现的木炭可以追溯到不同的时期，这表明物种的用途发生了模式上的变化。
2
A little longer shall your city walls separate your hearths from your fields.
你们的城墙还会把你们的房屋与田野隔开一段时间。
3
This animal skin over wood frame structure included two entrances and two hearths.