a thick layer of needles protects the buds from which new growth proceeds; consequently they are able to withstand forest fires relatively well
a thick needle layer protects buds from where new growth proceeds, so that they can withstand forest fires relatively well
a thick layer of needles protect the buds from which new growth proceeds; thus, they are able to withstand relatively well any forest fires
since the buds from which new growth proceeds are protected by a thick needle layer, consequently they can therefore withstand forest fires relatively well
because the buds where new growth happens are protected by a thick layer of needles, they are able to withstand forest fires relatively easily as a result
请问大家这个a thick layer of needles 在这里是是layer还是needle做protect的主语呢?如何分析这种xx of xx形式的主语呢?之前有一个a set of strings又是看strings。。有点迷茫。