hand-held造句

例句与造句

1. the sale of hand-held electronic calculators has increased at a significant rate .
   袖珍电子计算器的销售量增加很快。
2. the most convenient and generally used device is a simple hand-held smoke puffer .
   最方便和被广泛采用的装置是一种简单的手提发烟器。
3. by the later part of the sixteen hundreds, small hand-held camera obscuras were commonplace .
   到17世纪后半叶时，小的手提式暗箱已经很普通了。
4. we conclude that hand-held electronic calculator sales should be approximately 446, 600, 000 units by 1979 .
   我们推测出，1979年袖珍计算器的销售量大约为446，600，000只。
5. It's difficult to find hand-held in a sentence. 用hand-held造句挺难的