Walking can be a dangerous form of exercise , with oversize log and coal trucks barrelling down the twisty mountain roads .
那些超载这煤炭和原木的卡车沿着崎岖的山区公路狂飙，使得走路也可能成为一种危险的锻炼。
Although mr reagan 's ultra-keynesian america is barrelling along towards full employment , all its trading and budget accounts are frighteningly out of balance .
