I'm jacking into the Internet now.

我正要接入互联网。

Jacking-up apparatus for high pressure oil.

高压油顶起重装置。

The gang was jacking around and broke your window.

那帮人四处游荡，把你家的窗玻璃都给打碎。

Control of Jacking Techniques for Steel Pipes Curtain.

钢管幕顶进控制技术。