球类运动用语 ... 循序渐进训练 progressive training 循环（轮转）训练 cyclical training ; circuit training ; circle drill 重复训练 repeated training ; repetitious training ; reiterating training ...
He also noted that Shell is awaiting word on licenses from the U.S. government before deciding whether it will resume attempts to drill offshore in the Arctic circle off the shore of Alaska in 2014, something that is opposed by environmental groups.