Sumatra
n. 苏门答腊岛（印尼西部的大岛）
🗣️ 情景例句
Oh, five or six years ago.
哦，五六年前。
Good night,John.
晚安，约翰。
Some of this heat near the earth's surfact is used to make electricity.
靠近地表的一部分热量已被用来发电。