關於「Google Play Billing Library」標籤，搜尋引擎有相關的訊息討論：

Integrate the Google Play Billing Library into your app - Android ...Purchase tokens and Order IDs · A purchase token is a string that represents a buyer's entitlement to a product on Google Play. It indicates that a Google user ...缺少字詞： gl= | 必須包含以下字詞：gl=Meet Google Play Bill