飞行员在黑暗条件下飞行并到达模拟环境，在海豹队员用速降绳降落的时候飞机处于悬停状态。
The pilots flew in the dark arrived at the simulated compound and settled into a hover while the SEALs fast-roped down.
在黑暗和散射光的照射下病斑都能产孢，但在黑暗条件下的产孢量明显高于在散射光条件下的产孢量。
Lesion can produce spores under either direct light or black light, but under blacklight can produce more spore than under direct light.
在完全黑暗的条件下，根本无法进行光合作用，但绝大多数光养生物都通过依赖混合营养体的营养循环生存了下来。
No photosynthesis could take place under the complete darkness, but the phototrophs mostly managed to survive based on nutrients cycled by the active mixotrophs.
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