航向正前方

The robot moves along a line under the circumstance that it aims at the goal in a small angle and there is no obstacle just before it. Otherwise, it moves toward the best subgoal along a round curve.

若机器人航向在一个规定的小角度范围内对准目标且机器人正前方无障碍物，机器人作直线运动；其他情况下，机器人以圆弧接近最佳亚目标。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。