There may be much faltering, stumbling, and temporary defeat; difficulties and temptations manifold to be battled with and.

这过程中，总会有许多的动摇不定、不慎失足与暂时的挫败；有种种的困难和诱惑在等待你去战胜、去克服。

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Geology structure often presents non-manifold situation due to faults, resulting in relatively difficulties on complex geological structure modeling.

地质结构往往由于断层等的存在经常呈现出非流形的情况，使得对复杂地质结构建模相对困难。

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