He answered the students' questions one by one, wiping the sweat from his face and smiling:,The mechanism of a gun is to gather all the force of the body into one point. The human body's power comes from its legs. With the contraction of muscles, Darren's military boots turned slightly, gripping the ground like nails.,Jia Ji stood with a pose he thought was cool, taking a deep breath under the watchful eyes of everyone.。