n.往復(fù)運(yùn)動(dòng)(往復(fù)運(yùn)動(dòng)；梭動(dòng))
Trucks shuttled to and fro on the high ways. 車輛在高速公路上穿梭行駛。
We shuttled the passengers to the city center by helicopter. 我們來來回回地用直升機(jī)把旅客運(yùn)送到市中心。
