ðeɪ pɚfˈɔːɹm ðiːz fˈʌŋkʃənz ɪn ɐ stɹˈɪktli kəntɹˈoʊld lˈæbɹətˌɔːɹi ɛnvˈaɪɹənmənt wˌɛɹ ðə tˈɛmpɹɪtʃɚ ænd hjuːmˈɪdᵻɾi ɑːɹ kˈɑːnstəntli mˈɑːnɪɾɚd.
They perform these functions in a strictly controlled laboratory environment where the temperature and humidity are constantly monitored.