岩石滑得像个球，他们无法爬行，只能匍匐前进。
The rock was slippery as a ball, and they had to crawl rather than climb.
他只是一个匍匐爬行的婴儿。
如往下爬行，用胳膊肘支撑身体交替着匍匐前进为好。
Such as crawling down, support the body with his elbow alternately crawl as well.
如往下爬行，用胳膊肘支撑身体交替着匍匐前进为好。
Such as crawling down, support the body with his elbow alternately crawl as well.
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