And if the corkscrew goes into the blackboard you will see the tail of the vector and you will see a cross, little plus sign and therefore we put that like so.
钻进黑板之后，就可以看到矢量的尾端，你们会看见一个小叉，一个小加号，看起来是这样的。
2
At the cross roads his car hit the tail of a truck.
他的轿车在十字路口撞上了一辆卡车的尾部。
3
Choosing among different column cross-section forms and supporting forms in structural designing of kiln tail would have a great effect on the integral working performances and construction costs.