My boyfriend gave me a gift.

Everyone was surprised by the news.

This cross-section view shows the internal structure of the building.

I plan to build a new house according to this blueprint.

In order to calculate the centroid of this shape, you need to know the area of each part and the position of its centroid.

We will build a new building based on this blueprint.

This phase diagram shows the state of the substance.

He started drawing a new picture.

From this bird's-eye view, you can see the layout of the entire town at a glance.

He looked at the cadastral map and confirmed the boundaries of the land.