Sunglasses allow better vision in bright daylight, and may protect one's eyes against damage from high levels of ultraviolet light. Typical sunglasses are darkened for protection against bright light or glare; some specialized glasses are clear in dark or indoor conditions, but turn into sunglasses when in bright light. Most sunglasses do not have corrective power in the lenses; however, special prescription sunglasses can be ordered. Specialized glasses may be used for viewing specific visual information (such as stereoscopy) or 3D glasses for viewing three-dimensional movies. Sometimes glasses with no corrective power in the lenses are worn simply for aesthetic or fashion purposes. Even with glasses used for vision correction, a wide range of designs are available for fashion purposes, using plastic, wire, and other materials. Ink is sprayed out from the nozzle by a certain pressure, while the drive rod shake in required frequency and amplitude so as to split the ink into drops, then the machine charge the ink drops. Ink drops with different electric quantity charged are deflected by the force generated in the high voltage electric field. Meanwhile, through the movement of the products, we got the image-text coding information we need. Repetitive Behavior: If you want to have a recurrence of the same night the same night, men should go to the urine (remove any sperm), and then carefully wash his penis to exclude any semen.