South : mouse control, control angle below the left arrow around, the efforts to control long. Muse pressed the launch.南：鼠标控制，下方左边的左右箭头控制角度，大长条控制力度。木塞按下发射。
Use the right and left arrow keys or left-mouse click to walk through the presentation.使用左右箭头键或滑鼠左键阅览资料。