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Experts say technical issues are probably the real reason for the delay.
专家说，拖延交货的真正原因可能出于技术性问题。
youdao
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Experts in the UK said the study was a technical 'tour de force';
英国专家评论说该研究是一项科技“壮举”；
youdao
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Experts in the UK said the study was a technical 'tour de force';
英国专家评论说该研究是一项科技“壮举”；
youdao