1. He unwarily stepped into the street without looking both ways, nearly getting hit by a car.
他不小心地踏入街道，没有两边看，差点被一辆车撞到。

2. The hiker unwarily wandered off the marked trail and got lost in the dense forest.
这位徒步者不小心地偏离了标记的小道，在茂密的森林中迷路了。