to assay
to analyze or test a substance, typically in a laboratory setting, to determine its components or qualities

analisar, testar

[verbo]
assiduous
working very hard and with careful attention to detail so that everything is done as well as possible

assiduo, diligente

[adjetivo]
signatory
a person, organization, or country that has signed a formal agreement

signatário, parte signatária

[substantivo]

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