| 词汇 | crawl |
| 词根词缀 | 词源： c.1200, crewlen, from a Scand. source, perhaps O.N. krafla "to claw (one's way)." If there was an O.E. *craflian, it has not been recorded. Swimming sense is from 1903, the stroke developed by Frederick Cavill, well-known English swimmer who emigrated to Australia and modified the standard stroke of the day after observing South Seas islanders. So called because the swimmer's motion in the water resembles crawling. 词根记忆： v. /n.爬行,蠕动;缓慢(的)行进Step by step, the sleepy creeper crawled into my sleeve to sleep.昏昏欲睡的爬虫一步一步爬进我的袖子里睡觉. |
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