Welcome to the unit
While the pace of change in the modern world gets faster and faster, people are becoming more and more aware of the need to preserve the world’s cultural heritage.
1) while conjunction
during the time that, or at the same time as: 当…..时候，在此期间
I read it while you were drying your hair.
While I was in Italy I went to see Alessandro.
I thought I heard him come in while we were having dinner.