Standard antibiotics usually contain only one active ingredient, while herbal antibiotics contain many. 
Depending on the size, the supermarket may need one or three security guards to prevent theft. If a supermarket decides to use three security guards, it must be a big supermarket
 herbal drugs are more likely to maintain their efficacy against new drug-resistant bacteria than standard antibiotics.For a strain, it is just as difficult for a chef to make a dish that can satisfy dozens of guests at the same time, just as it is difficult for a chef to make a dish that satisfies the taste of dozens of guests at the same time, while it is much easier to make a dish that satisfies the taste of one guest.