Car manufacturers are already producing small numbers of electric vehicles to test customer acceptance.汽车制造商已经生产了少量电动车，检验消费者的认可情况。As the world population of Hawaiian geese has shrunk to very small numbers, the bird's continuing viability is in doubt.全球范围内夏威夷雁已经所剩无几，这种鸟能否继续繁衍下去让人怀疑。Guns continued to be produced in small numbers.枪支继续被小批量地制造出来。