Equal (4): Everything in this space must be equal to 4. The answer is 4-5, placed horizontally; 4-4, placed vertically.
// drop-oldest: Discard old data to make room
，详情可参考heLLoword翻译官方下载
Ultimately, the most rigorous traceability solutions, including QR codes and microchips, won't be useful if people don't actually check them as a condition of making their purchases. Imitators can simply counterfeit QR code labels, for example.
Жители Санкт-Петербурга устроили «крысогон»17:52