Lost amid the neon: Water bugs make use of earth dikes for pupation, but newfangled gutters and drainage ditches are lined with cement, and no matter how tough these bugs are, there's no way they can burrow into cement.
水生幼蟲利用土堤化蛹，「新式」的溝渠、水圳，全部以水泥襯底，蟲兒再厲害，也無法在水泥地上打洞。