tip edge engagement

例句：

1. 1. The tip of the pen is where you write your name.
   这支笔的尖端是写名字的地方。
2. 2. The car's front wheel is the tip of the vehicle.
   汽车的前轮是车辆的前端。
3. 3. The chef used a sharp knife to cut the tip of the steak.
   厨师用一把锋利的刀切下了牛排的尖端。