ancient underground caverns
ancient underground caverns
古老的地下洞穴
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The Longyou large ancient underground caverns contains the long-term integrity about two thousands years, but the field investigations show that the caverns are being up against many diseases.
龙游大型古地下洞室群虽然已保持了长达两千年之久的完整，但是现场调查发现，这些洞室存在着许多病害现象。
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