一种为安全交易配置的便携式电子系统包括具有宽度、长度和厚度的卡，其中长度与厚度的比至少为5。
A portable electronic system configured for a secure transaction includes a card having a width, length, and thickness, wherein a ratio of length to thickness is at least 5.
一种为安全交易配置的便携式电子系统包括具有宽度、长度和厚度的卡，其中长度与厚度的比至少为5。
A portable electronic system configured for a secure transaction includes a card having a width, length, and thickness, wherein a ratio of length to thickness is at least 5.
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