入侵一个地区的物种会危害生态系统、农业和人类健康。
Species that invade a territory can harm ecosystems, agriculture and human health.
这些外来物种大多数都轻而易举地融入了所到之处的生态系统。
Most such aliens blend into the ecosystem in which they arrive without too much fuss.
保护生态系统和拯救物种并不是给富人带去奢侈品。
Preserving ecosystems and saving species are not luxuries for the rich.
我们正在揭示一个完整的生态系统，它包含了很多闻所未闻的新型物种。
We’re uncovering an entire ecosystem filled with new species no one has seen before.
实际上大部分引入物种(对生态环境)一点(消极)影响也没有。
Indeed, most species that get introduced don't have much effect at all.
生态环境不同，物种自然存在差异。
Naturally, species differ in different ecological environment.
可能生态旅游对某个特定物种有好处，因为人类越来越关注它的生存。
Ecotourism may be good for a given species, as humans become engaged in its survival.
外来侵害性物种会打乱生态平衡，常常导致一些当地物种灭绝。
Invasive species can and often do upset the ecological balance and wipe out local varieties.
外来侵害性物种会打乱生态平衡，常常导致一些当地物种灭绝。
Invasive species can and often do upset the ecological balance and wipe out local varieties.
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