barriers to advance and retreat
琉璃、珊瑚、琥珀、砗磲、玛瑙 » Glass, coral, amber, clam, agate 进退壁垒 » Barriers to advance and retreat 我以前从未看过如此有趣的翻译公司 » I had never before seen such an interesting translation co. , ltd.
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barriers to advance and retreat
前进和后退的障碍
以上为机器翻译结果，长、整句建议使用 人工翻译 。