1.   An elaborate system of nozzles and fan-draught cowls minimises the risks of lead-poisoning.

2.   An elaborate system of rain-water drains can be seen, reconstructed by Evans, at the East Entrance.

3.   An elaborate system of spectral classes has been established by a persistent cadre of asteroid observers.

4.   Good luck, bad luck, an elaborate system of beliefs, superstitions, symbols.

5.   Mike had worked out an elaborate system for categorizing his collection of CDs.

6.   Mike had worked out an elaborate system for categorizing his collection of DVDs.

7.   The proposal has to get through an elaborate system of committees.

8.   An elaborate system of dikes built to protect the lowlands from the relentless onslaught of the sea.