例句與造句

1. Copying pencils saw extended use in World War I in the completion of a wide range of paperwork.
2. Some documents that were to be copied with copying presses were written with copying pencils rather than copying ink.
3. Suddenly he stopped at one spot and taking out a copying pencil he drew a circle around that spot.
4. Consequently, the copying pencil was being used as an indelible pencil, a precursor to the ball-point pen.
5. Copying pencils were introduced in the 1870s, and were originally marketed for copying documents, especially for making permanent copies of a permanent original.
6. It's difficult to find copying pencil in a sentence. 用copying pencil造句挺難的
7. The cores of copying pencils, which appear to have been introduced in the 1870s, were made from a mixture of graphite, clay, and aniline dye.
8. This was achieved by creating a hand written document using a copying pencil, laying a moist tissue paper over the document and pressing down with a mechanical press.
9. The copying pencil served as a convenient substitute for the fountain-pen : it could be carried on one's person without need for ink or fear of leaks.
10. Since the aniline dye was poisonous to humans, many injuries and illness related to copying pencils were reported in the medical literature, especially in the late-19th-and early-20th centuries.
11. Furthermore, for producing copies using carbon paper, copying pencils were considered superior to both ordinary pencils ( whose writing in the original could be erased ) and fountain-pens ( whose nibs could not always withstand the pressure needed to produce the carbon-copy ).