Before cutting the frame, check the mitre lines on each corner to ensure they meet precisely.

The technician studied the flat lines on the monitor and suspected equipment malfunction.

The ornithologist marked the migration patterns on the map, drawing several v-lines to indicate the flocks' flight paths.

Before the show, the cast ran lines in the empty theater to warm up.

Before the final rehearsal, they stayed late to run lines together in the empty theater.

Each evening she runs lines with her co-star to prepare for opening night.

Researchers compared the growth rates of several cell lines under identical conditions.

Hard lines, I know you were saving up for that trip and now the refund has been delayed.

When the factory shut down, the workers knew hard lines were coming for their families.

Before the wind picked up, she walked around the campsite checking the guy lines to make sure the tent was secure.