Ubercart Product Checkout Panes (6.x-1.1) - en to unknown language translation catalogue (3 entries)

en: SKU
target: SKU（唯一库存标识）

en: Ubercart - extra
target: Ubercart - 额外

en: <strong>SKU:</strong> !sku<br />
target: <strong>型号:</strong> !sku<br />
