17. What is a commission rate? Commission rates are typically based on a percentage of the total sale and in some cases can also be a flat fee for each transaction. The rates are set by the merchant.
“When leaving make it clear that you are removing yourself immediately so the chat does not fill up with people wishing you farewell,” Wesson said.
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Nature, Published online: 25 February 2026; doi:10.1038/s41586-026-10159-6
const posToTime = new Map(); // 映射：位置 → 到达终点的时间