" He ran around the corner , cannoning into a group of kids . "

他跑过拐角时与一群小孩相撞。

By cannoning water , sand and chemicals at them , a process known as hydraulic fracturing , or " fracking " , the bubbles can be released .

通过注入高压水，沙砾和化学物质可以释放出气体，这一过程被称作水力压裂或“压裂”技术。