1.   In an intricate series of experiments on the nerve fibers of squids and frogs, he and his colleagues showed how the human brain responded to nerve messages.

2.   Unfortunately, black text on plain paper looks somewhat washed out, and printing envelopes requires an idiotically intricate series of maneuvers that the manual describes in ten steps.

3.   Mission Control in Russia declared the downing of the Mir a success after an intricate series of engine firings positioned it before its final plunge into the atmosphere.

4.   Russia authorities said that an intricate series of engine firings, meant to ensure that no populated areas were placed in jeopardy, had gone as planned.

5.   Russian authorities said that an intricate series of engine firings, meant to ensure that no populated areas were placed in jeopardy, had gone as planned.

6.   The United States evaded the full apology demanded by China, which nevertheless extracted an intricate series of expressions of sorrow from Washington.