在仍残存1型脊髓灰质炎的比哈尔邦，必须在十分艰难的科西河谷更好地开展活动。
In Bihar, the other remaining reservoir of type 1 polio, operations must be further optimized in the very difficult Kosi river basin.
在澳洲的珊瑚海大堡礁的附近，还残存着这世界上仅剩的热带野生动物活动区域之一。
Australia's Coral Sea, near the Great Barrier Reef, is one of the last remaining tropical wilderness areas in the world.
残存于地质地层中的有机化学物质，当这样的地层被发现时，可以预测出那个地层形成时期的生命活动现象。
Chemical fossils Particularly resistant organic chemicals present in geological strata that are thought to indicate the existence of life in the period when the rocks were formed.
残存于地质地层中的有机化学物质，当这样的地层被发现时，可以预测出那个地层形成时期的生命活动现象。
Chemical fossils Particularly resistant organic chemicals present in geological strata that are thought to indicate the existence of life in the period when the rocks were formed.
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