emery rock

常見例句

The emery is a hard metallic substance.
金剛砂是非常堅(jiān)硬的金屬物質(zhì)。
She rubbed the glass with emery paper.
她用砂紙磨玻璃。
The rock was honeycombed with passages.
巖石上有許多蜂窩狀的小孔。
Many young rock hounds grow up to be geologists.
許許多多愛好收集巖石的少年，長大后成了地質(zhì)學(xué)家。
The climber had to negotiate a steep rock face.
那攀登者得攀越一陡峭巖石。
This layer of rock contains a lot of flint.
這一巖層中有大量燧石。