Described herein are a molecular memory obtained using DNA strand molecular switches and carbon nanotubes, and a manufacturing method thereof. The forwarded message may be an email message, and the system may operate to determine a destination electronic mail address of the destination user for inclusion in the forwarded message, and include an indication in the forwarded message that it has been forwarded from the synchronous communication application. It better optimizes the power transfer from a parallel tuned tank circuit primary coil to an implanted secondary series tuned tank circuit coil. That start encryption time information is transmitted from the first terminal to the second terminal. A caching program updates and maintains the database and obtains the needed data if a cache miss is encountered. The method includes allocating the same frequency-axis sequence and different time-axis sequences to a plurality of terminals by using a resource index according to a first slot in the first slot; and allocating different frequency-axis sequences and different time-axis sequences to the plurality of terminals by using a resource index according to a second slot in the second slot.