They are a series of guidelines that determine the margins of the piece, space between page elements (headlines, body text, photographs, etc.), and let you know where to put things on the blank page.

The highest reading was 508 millisieverts in the town of Okuma, about 3 km from the nuclear plant.

Now he is usually seen around the corner of 48th Street and Seventh Avenue, a block or two from the heart of Times Square.