Spelling an umlaut as ae, oe, or ue only maps to the corresponding exact match without further expansion.
将元音变音拼写为ae、oe或ue只会进行精确匹配，而搜索结果不会进一步扩大。
An experimental approach on the characters of acoustic emission (AE) of marble samples withpre-existing cracks under compression is carried out.
采用含预制裂隙大理岩块试件，对压剪应力场中试件破坏过程声发射特征进行研究。
It is indicated that AE technique has been an important means in the studies of the damage to materials.
揭示了声发射技术已经成为研究材料破坏的一种重要手段。
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