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Illustration of the sealing process. Stepwise stimuli accelerate the flytrap transition from the semi-closed state (XI, XO) = (0.5, 0.5) to the closed state (XI, XO) = (0, 1). Two trigger impulses occur at 2 and 3 seconds, respectively. They can help the dynamics move across the semi-closed state. The cell growth becomes the main driving force later. It may take more than 1 hour to complete the whole process.
