one of a set of toothed wheels that work together to alter the relation between the speed of a driving mechanism (such as the engine of a vehicle or the crank of a bicycle) and the speed of the driven parts (the wheels).
a racing bike with ten-speed gears
同义词：
gearwheeltoothed wheelcogcogwheelgear ratiospeed
2
equipment that is used for a particular purpose.
camping gear
同义词：
equipmentapparatusparaphernaliaarticlesappliancesimpedimentatoolsutensilsimplementsinstrumentshardwaregadgetsgadgetrystuffthingskitrigtackleoutfitresourcesamenitiessuppliesfurniturefurnishingsfittingsodds and endsbits and piecesbits and bobstrappingsappurtenancesaccoutrementsregaliamaterielbaggageinformal：box of tricksclobbergubbinsodds and sodsarchaic：equipage
动词
1
prepare, adjust, or equip for a particular purpose or need.
they gear workouts to your specific needs
2
design or adjust the gears in a machine to give a specified speed or power output.
