1. 选择步长序列（如: n/2, n/4, ..., 1）
The Moon is looking big and bright in the sky tonight, and we're not far away from the Full Moon. With so much of its surface illuminated, there will be plenty for you to spot tonight, so keep reading to find out what you can see.
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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.
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