Tumors in deep part that optic fibre cannot reach to.
光导纤维不能到达的深部肿瘤。
But Virgin's network is limited and fibre-optic cables are expensive.
但是维京网络毕竟有限，而光纤电缆价格昂贵。
A new submarine fibre-optic cable is now being laid down the west African coast.
西飞海岸外正在铺设海底光缆，世界银行提供了三千万美金支持这个项目。
A new submarine fibre-optic cable is now being laid down the west African coast.
西飞海岸外正在铺设海底光缆，世界银行提供了三千万美金支持这个项目。
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