I told you. Get off the farm.
我告诉过你，离农场远点。
Robertson is not far off her target.
罗伯逊离她的目标不远了。
He boarded the boat and shoved off from the dock/ wharf.
他上了船，把船撑离了码头。
The plane has taken off.
飞机已离港。
This means that for much of the time both feet are off the ground.
这种情况下大部分时间人的双脚都是离地的。