探索物资：极少，每件物资 50% 概率不出现
没有预设使用它，选「自定义」才能设置。
来自游戏数据1
DifficultyParam 64
| ID | 64 |
|---|---|
| ParamType | 6 |
| Level | 4 |
| ParamName | DifficultyParam_ParamName_64 |
| ParamName_Local | 探索物资 |
| LevelName | DifficultyParam_LevelName_64 |
| LevelName_Local | 极少 |
| EffectDesc | DifficultyParam_EffectDesc_64 |
| EffectDesc_Local | 每件物资 50% 概率不出现 |
| Value1 | 0.5 |
| Value2 | 0.5 |