A clear even texture without mottling or veins is also preferred.

纹理清晰，甚至无脉或色斑也是首选。

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In poor countries, clinics in remote areas are eager for tests that can be done rapidly and without electricity, especially when no one trained to Pierce veins is available.

在贫困国家，偏远缺电的诊所非常希望可以快速完成化验，特别是在没有人接受过静脉穿刺训练的情况下。

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