But I can also clearly remember when I first started drawing them, the default reaction was "people scratching their heads".
但我至今清楚的记得，当我第一次把卡通画到商务卡上的时候，人们不约而同地感到迷惑不解。
2
A pointed type implicit surface drawing algorithm with iterative function is provided to solve the default and its implementation is very simple and it is easy to program.