strong interaction
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I find them every where, but not in strong force.

But we are too strong a force for them to attack.

But what was it doing in a theory of the strong force?

It seems that life is really a very strong force.

"But, no matter what, we will still be a strong political force in this city."

Perhaps a force stronger than any of us held her back.

This 400-personnel strong special force went to full operation in 2005.

He answered questions such as "What is the strong force?"

The King, in his turn, refused to give them up, and raised a strong force.

The strong force has potential energy, just as gravity and spring forces do.