Opsiometer
[医] 视力计
🗣️ 情景例句
Do you have any brothers or sisters?
你有兄弟姐妹吗？
Two dogs strive for a bone,the third runs away with it.
两狗相争一骨头，第三只狗衔起走。
With the invention of writing, a great advance was made, for knowledge could then be not only communicated but also stored.
随着书写的发明，又迈进了一大步，因为这样一来，知识不仅能交流，而且能储存了。