就我的经验而言，我发现即使是那些不确定性的操作，在大多数条件下基本上也能在固定的时间内完成。
In my experience I have found that even the non-deterministic operations will complete in almost constant amount of time under most conditions.
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.
大多数物质，如牛奶和水都是反磁体，即他们会排斥外来磁场，这种现象很微弱，在常规条件下是几乎是观察不到的。
Most materials, including milk and water, are diamagnetic, which means they are repelled by external magnetic fields-though this phenomenon is far too subtle to be observed in normal circumstances.
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