rely mainly造句

They rely mainly on woodpeckers, and none is a more expert carpenter than the black woodpecker of northern Europe.

Lever-type safety valve lever to rely mainly on the weight of the work force, but the lever-type safety valve size often limit the choice of scope.

Aerosol-type air refreshing agent is emerging in recent years, the aroma regulation technologies rely mainly on experience accumulating, reports in this area were few.