This untutored mathematician had an obsession with numbers.
这位未接受过正式教育的数学家对数字十分痴迷。
《柯林斯英汉双解大词典》
2
They use new types of guns, and birds could easily be shot down in flight, and in such great numbers that commercial hunting of ducks and geese became an industry.
他们使用新型枪支，鸟类在飞行中很容易被击落，而且数量很大，以至于商业捕猎鸭鹅成了一种行业。
3
This manual fixation—an indirect by-product of walking upright on two legs—has helped yield numbers in most cultures, but not all.