mientras que bedeutet auf Englisch

as long as▼(while)
conjunction
[UK: əz ˈlɒŋ əz] [US: ˈæz ˈlɔːŋ ˈæz]

whereas▼(but in contrast; whilst on the contrary…)
conjunction
[UK: weər.ˈæz] [US: hwer.ˈæz]

while▼(during the same time that)
conjunction
[UK: waɪl] [US: ˈwaɪl]