1. free of charge 意為“免費的”。
eg. Delivery is free of charge.
免費送貨。
The department store delivers free of charge.
eg. 這家百貨商店免費送貨。
eg. The conversation is encrypted and, while in the network, free of charge.
談話內容經過加密處理,而且在網內是免費的。
2. demonstrate vt. 證明;展示;論證
vi. 示威
eg. How can I demonstrate to you that my story is true?
我怎么才能向你證明我的話是真的呢?
eg. An example will demonstrate how these objects work together.
示例將驗證這些對象如何一起工作。
3. It helped me out a lot. 收獲不少。