yellow是什么意思？

The same year, the Federal Aviation Authority required that the boxes, which were never actually black, be painted orange or yellow to aid visibility.

Why did the Federal Aviation Authority require the black boxes be painted orange or yellow

Students mark the main ideas and important details with a pen or pencil, yellow or blue or orange.

It's about an hour outside Seoul, built on reclaimed tidal flats along the Yellow Sea, There's a Coast Guard building and a tall trade tower, as well as a park, golf course and university.

In Act One of the show, a yellow cube is lifted from a blue box, and moved across the stage.

Act Two is similar except that the yellow cube is smaller

Brick and mortar stores (实体店) seem to be going the way of the yellow pages.

They scanned the brains of teens and adults who were playing a virtual driving game designed to test whether players would brake at a yellow light or speed on through the crossroad.