11.   Brenda used both Creole and London English, code switching between the two.

12.   People thus switch between them as the balance of advantage changes.

13.   As a contrarian fund, Contrafund switches between growth and value, but is currently leaning toward growth.

14.   As transistors switch between open and closed states, they pulse light for a matter of picoseconds, or trillionths of a second.

15.   Balducci Chapin switches between playing Lily and directing one or two other actors.

16.   Both computers run exactly like their one-dimensional counterparts, and switching between systems is accomplished by a simple keystroke.

17.   Brash voices sing and rap, switching between English and Spanish and sometimes dropping into a Jamaican dancehall patois.

18.   But Morris said that the unemployment rate has historically switched between high and low levels extremely quickly.

19.   But promoters contend that Sibelius makes it far easier to switch between various entry modes and move parts of the composition around.

20.   But switching between categories can be slow.