Understand, because there is no head-to-head test. <br>1: Yes, it cannot be proved that it is better, but it can only be proved to be effective. In fact, this effect has been confirmed by other experiments.
Understand, because there is no head-to-head test.<br>1: Yes, can not prove that it is better, can only prove that it is effective, in fact, this effective other tests also confirmed.
Yeah, because there's no head-to-head test.<br>1: Yes, it can't be proved that it is better, but it can only be proved to be effective. In fact, other experiments have also confirmed its effectiveness.<br>