a. 要使颈骨折断似的, 非常危险的
s. moving at very high speed
以上参考资料就是本词典详细汇总的词语breakneck是什么意思的翻译解释，如有错漏请向我们提供反馈意见。
Although the technology was relatively primitive, it was developing at breakneck speed.
尽管那时的技术还相当原始 它的发展速度极其惊人
