like: Reinheit → →
die Reinheit ☊ 
độ tinh khiết ☊ 
☊ Reinheit ☊ 纯正 ☊ chúnzhèng a car with dual control(s) (= one set of controls for the driver and one for the instructor ). ☊ control ☊
White has always been a symbol of purity in Western cultures. ☊ symbol ☊
test sth for sth: The water is regularly tested for purity. ☊ test ☊