这些瀑布始终是鲑鱼和海鳟鱼不可逾越的障碍。
The falls have always been an insurmountable obstacle for salmon and sea trout.
这些公园已经吸引了专业游客，包括来攀登技术难度高的山峰的登山者，以及被当地河流中的鲑鱼和鳟鱼吸引的渔民。
The parks already attract specialist visitors, including mountaineers, who come to climb the technically difficult peaks, and fishermen, lured by the salmon and trout in the region's rivers.
鲑鱼和鳟鱼对水质较为敏感，陆地养殖成本过高。
Salmon and trout are more sensitive to water quality, making land-based systems more expensive.
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