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1) He is fully justified. He not only has one or two reasons, he has every reason.
2) A crisis that is so bad that it has "crippled," or almost brought to a halt, the operation of the company, government, etc.
3) Dynamics in the sense of forces. "Not only was John extremely intelligent and creative, but he thoroughly understood the political dynamics of the times. He was an ideal campaign manager."
please explain 
Linear Mode
