不，是先期渲染的但看起来是实时的。这节省处理的时间，说实话看起来和即时演算的没区别。
No, it is pre-done but looks real. This is to save on processing and quite honestly, you would see no difference.
原有的反演算法中，在计算这部分影响的时候，需要大量的关于地表植被状况的辅助数据，而这些即时的辅助数据往往不易获得。
Much ancillary data are needed for computing the attenuating effects of the vegetation layer in the soil moisture retrieval model before, and the ancillary data are often unavailable.
原有的反演算法中，在计算这部分影响的时候，需要大量的关于地表植被状况的辅助数据，而这些即时的辅助数据往往不易获得。
Much ancillary data are needed for computing the attenuating effects of the vegetation layer in the soil moisture retrieval model before, and the ancillary data are often unavailable.
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