I have to warn you however! Until today I had never written a particle engine.

无论如何我还是想告诉你，至今为止我都没有写过一个粒子系统。

youdao

However, until today, there is still no a generalized and commonly accepted quality standard.

但至今没有一个公认的、统一的质量标准。

youdao

However, until today, there is still no a generalized and commonly accepted quality standard.

但至今没有一个公认的、统一的质量标准。

youdao