Cold fog dispersal has been an operational success in the U.S. since 1963.
Cold fog dispersal has been an operational success in the U.S. since 1963.
美国自1963年以来，冷雾消散在实际操作上一直是成功的。
Cold fog dispersal has been an operational success in the U.S. since 1963.
美国自1963年以来，冷雾消散在实际操作上一直是成功的。