cassiterite
n. 锡石
英英释义
Noun
- a hard heavy dark mineral that is the chief source of tin
例句
用作名词(n.)
- Cassiterite has been an important tin ore for eons and is still the greatest source of tin today.锡石作为一种重要的锡矿石已有数十亿年的历史，时至今日仍然是锡的重要来源。