在15公里标志处，我又喊了一声，不过这次情绪没有那么高涨了。
At the 15k mark (9.3 miles) I cried again, yet this time it wasn't exactly an emotional high.
放一个码尺在地板上，用胶带固定码尺在15英寸(38厘米)标志处。
Place a yardstick on the floor. Secure it by placing a piece of tape across the yardstick at the 15-inch (38-centimeter) mark.
在30公里标志处，我已疲惫不堪，很想停下来，但我还是坚持跑着。
At the 30km mark, I felt exhausted, and wanted to stop, but I kept on going.
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