71.篮球粗糙的表面便于球员握球.
The rough surface of basketball is advantageous for the player to grasp the ball.
72.很抱歉让你扫兴,但我恐怕还是不能来.
I'm sorry to let you feel disappointed,but I'm afraid I still can't come.
73成年人和小孩都觉得探索宇宙是一件很刺激的事情.
Adults and children all feel that exploration universe is an exciting matter .
74.我们的注意力已经被吸引到焰火奇观上了.
Our attention is already attracted to the fireworks marvelous sightin.
75.为了讲清楚自己的观点,他有解释了一遍.
In order to say clearly his own viewpoint,he explains again.