帮忙把下面几句话翻译成英语，谢谢啊~

Question

随机函数random（）
取得当前帧函数_currentframe
with()方法
碰撞检测hitTest（）的用法
制作循环背景
物体反复从舞台经过

Answer 1

Function of random number creation.
Function of getting the current frame.
Method
The usage of hit test
Make a cycling background
one object pass through the stage repeatedly.