1.Cave paintings in France and Spain,however,are in recesses and caverns far removed from originacave entrances.2.Great Britain had large amounts of coal; however,there were not yet efficient means by which to produce mechanical energy or to power ma

1.Cave paintings in France and Spain,however,are in recesses and caverns far removed from origina
cave entrances.
2.Great Britain had large amounts of coal; however,there were not yet efficient means by which to
produce mechanical energy or to power machinery.
为什么第一句中,However 将整句话和这句话的上文进行转折,而第二句中的however将there were not和Great Britain 进行转折?

第一句,是比较法国和西班牙的岩画与别的国家的岩画.
第二句,是先说英国有大量的煤炭,但是还没有很好的办法利用

1>.然而,法国和西班牙的石洞壁画正处于停滞状态,石洞被从原来的地方挪到很远的地方.
----->这里的HOWEVER是将这句和上文进行转折.

2>.大不列颠英国有丰富的煤矿资源,但是,对于生产机械能源或者电力能源,他们还没有有效的方法.
---->.这里的HOWEVER是对有丰富的资源进行转折的....

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1>.然而,法国和西班牙的石洞壁画正处于停滞状态,石洞被从原来的地方挪到很远的地方.
----->这里的HOWEVER是将这句和上文进行转折.

2>.大不列颠英国有丰富的煤矿资源,但是,对于生产机械能源或者电力能源,他们还没有有效的方法.
---->.这里的HOWEVER是对有丰富的资源进行转折的.

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