例句與造句

1. Parallel straight lines are straight lines which , being in the same plane and being produced indefinitely in both directions , do not meet one another in either direction
   平行直線是在同一平面內的直線，向兩個方向無限延長，在不論哪個方向它們都不相交。
2. It's difficult to find parallel straight lines in a sentence. 用parallel straight lines造句挺難的