"corundum" 怎么发音
word
kɝˈəndəm
ker-UHN-duhm
kəɹˈʌndəm
kuh-RUN-duhm
释义
Corundum is a very hard mineral made of aluminum oxide, often used as an abrasive. When it is transparent and colored, it becomes precious gems like rubies and sapphires.
IPA 音标
美式英语
kɝˈəndəm
英式英语
kəɹˈʌndəm
简化发音
美式
ker-UHN-duhm
英式
kuh-RUN-duhm
语境中听
Corundum is one of the hardest natural minerals.
The gemstone ruby is actually red corundum.
Corundum is used in some types of sandpaper.
Did you know sapphires are just blue corundum?