Definition: to start to leave a place or begin a trip, walk, etc. Level: C1
我们决定早点出发以避免交通堵塞。
We decided to ___head ___off early to avoid the traffic.
收拾好行李后，我们出发开始全国公路旅行。
After packing our bags, we ___headed ___off on our road trip across the country.
徒步者将在黎明出发，以便中午前到达山顶。
The hikers will ___head ___off at dawn to reach the summit by noon.
