1·How do the back crawl swimmers see where they are going?
仰泳的选手如何知道他们前进的方向呢？
2·Normally, the neural crest cells crawl through the embryo and form a strip running along the back.
通常情况下，神经嵴细胞会爬过整个胚胎并形成一条横贯背部的窄带。
3·I feel like everything slows to a crawl. And when I shift back up to a higher level perspective, it's like I'm back in the flow again.
我感觉到一切慢得像爬行，然后我又转回高层次视角，就像我回到了那股流中一样了。
4·The webmasters tool allows you to check crawl issues, back links, outbound links and also sitemap.
网站管理工具允许你检查抓取的内容，反向链接，出站链接，也可以是站点地图。
5·America's GDP growth slowed to a crawl over the summer as builders cut back.
随着建筑商数量的减少，夏天里美国的GDP增长也慢的像蜗牛爬。
6·So now I have to crawl my way back.
所以我现在只能一步步往上爬了。
7·You get the idea.My morning ritual isn't very exciting, however, by following this plan my brain and body know what to expect and I'm less likely to crawl back into bed.
你已经知道了吧，我早间的例行公事能并不是能激动人性的，然而，顺着这些计划，我的脑袋和身体都知道接下来要做什么，而我也不会想着睡“回笼觉”去。
8·The road is giving out all over! I think I can crawl back up.
路面整个都松动了，我想我能慢慢爬上去。
9·I think I can crawl back up.
我想我能爬上来。
10·Listening to her generous laugh, I felt a switch flick deep inside me and began to crawl back into the land of the living.
听着她爽朗的笑声，我觉得内心颤抖了一下，又重新回到现实中来。