In this way a pn-junction can be used as a diode – it can allow a current to flow, but only in one direction.

At 3:30 A.M. a huge Zeppelin flew across the British battle line, wirelessing down to any Germans still to the westward the best way to get home.

[I]n the 575 days since [Oscar] Pistorius shot dead his girlfriend Reeva Steenkamp, there has been an unseemly scramble to construct revisionist histories, to identify evidence beneath that placid exterior of a pugnacious, hair-trigger personality.

Some of the stadiums being built for the World Cup soccer tournament, scheduled for next year, have also been criticized for delays and cost overruns, and have become subjects of derision as protesters question whether they will become white elephants.