half axis

例句：

1. 1. The car's steering wheel is on the right side of the half axis.
   汽车的方向盘在半轴的右侧。
2. 2.The scientist used a half axis to measure the angle between two points.
   科学家使用一个半轴来测量两点之间的夹角。
3. 3. The projectile was launched with a half axis pointing towards the target.
   弹射物以一半轴指向目标发射。