重力場

gravitational field

to repeat / repetition / again / re- / classifier: layer

heavy / serious / to attach importance to

gravity

power / force / strength / ability / strenuously

force field (physics)

threshing floor / classifier for events and happenings: spell, episode, bout

large place used for a specific purpose / stage / scene (of a play) / classifier for sporting or recreational activities / classifier for number of exams