1. An appreciable reduction in oxygen content will lead to disomfort and possible death. 当空气中的氧含量明显下降时，人会窒息甚至可能死亡。
2. The key for improvement is to place the planning in an appreciable scene and construct an appreciable urban landscape garden pattern. 取得改观的关键，在于将规划设计置于一个可感知的场景中，营造可感知的山水园林城市形态。
3. Such "sun ship" would have a large enough surface area to carry the enormous number of solar cells necessary to move any appreciable load. 这种“太阳能飞艇”必须有很大的面积以携带大量的太阳能电池，这样才有可能运载可观的载荷。
