(1) Photosynthesis is an endergonic process.

(2) Real cells link non-spontaneous processes, called endergonic, which do not occur without the addition of free energy, to spontaneous processes which supply that free energy.

(3) In order to realize the optimization of the endergonic structure, provides a optimization method by the integration of the I- DEAS , ANSYS/LS-DYNA and ISIGHT softwares.

(4) Take an underground vehicle for example, the optimization process of the endergonic structure is shown, and finally the reasonable structure is acquired.

(5) Whereas cellular respiration is highly exergonic and releases energy, photosynthesis requires energy and is highly endergonic.

(6) Threshold energy is defined as the minimalist kinetic energy of the incoming particles which can cause the endergonic nuclear reaction.

(7) Thermodynamic considerations indicate that the reduction of phosphate to phosphine is endergonic.