这些喷雾液
These sprays
以上为机器翻译结果，长、整句建议使用 人工翻译 。
这些因素包括进一步开展大规模试验的需要，数个国家对该产品的正式批准，和其普通的现成喷雾液类型相对较短的货架寿命。
These include a need for further large-scale trials, official approval of the product in several countries, and a relatively short shelf-life in its normal ready-to-spray liquid form.
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