例句與造句

1. A main focus of the TRACE instrument is the fine structure of coronal loops low in the solar atmosphere.
2. And the tracing instrument, now about as large as a suitcase, could be reduced to " shoe box size, " he predicted.
3. Ronalds created the first accurate drawings of many of them with his patented perspective tracing instrument, which were printed in a book " Sketches at Carnac ( Brittany ) in 1834 ".
4. It's difficult to find tracing instrument in a sentence. 用tracing instrument造句挺難的