1.   Previously, Euclidean geometry had stated that parallel lines never meet.

2.   The political story gave indications of following along parallel lines.

3.   Parallel lines will never meet no matter how far extended.

4.   ...seventy-two ships, drawn up in two parallel lines.

5.   In the parallel line of the submissive, a pretty, dark girl of about twenty was emptying her handbag on the instructions of a uniformed harridan.

6.   The general rule is that when stimulus and response are parallel lines the transaction will continue, but when the stimulus and response lines cross, communication stops.

7.   For an ideal gas this is a straight line parallel to the pressure axis.

8.   Mark on parallel lines with the pastry wheel and then use it to wrap round the sides of the cake.

9.   And those parallel lines of light look uncannily like a Frank Stella pinstripe painting.

10.   Another had brown polka dots painted randomly between parallel horizontal lines, intersected by red vertical lines to form a grid.