non-destructive evaluation technique
non-destructive evaluation technique
无损评价技术
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Chinese ancient jade is invaluable because of its long history, exquisite technique and extremely scarcity. Therefore, its analysis or evaluation must be executed under non- destructive condition.
我国的古玉器由于历史悠久、工艺精美和存世稀少而有着很高的价值，因此其分析鉴定的必然要求在无损状态下进行。
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