A jar will be picked at random, and then a marble will be picked from the jar.
A jar will be picked at random, and then a marble will be picked from the jar.
随意拿起一个罐子，然后从里面拿出一个玻璃球。
A jar will be picked at random, and then a marble will be picked from the jar.
随意拿起一个罐子，然后从里面拿出一个玻璃球。