returned in case there is no argument or the argument is not a valid
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Credit: The Pokémon Company，详情可参考体育直播
Love Island seems to be having a moment this year - but why?
The jelly is chemically inert since no additives are needed for gelation. This allows chemicals dissolved in the jelly’s aqueous phase to diffuse well, a prerequisite for testing if certain species or strains are resistant to antibiotics or antifungals. In these simple assays, zones of growth inhibition of bacteria or fungi (or their absence) point to the effectiveness of (or resistance towards) antibiotics or antifungals.