calcium oxide 氧化钙
limestone 石灰石
chemical reagent 化学试剂
A: How much quicklime do we need for the construction site?
A：我们的施工现场需要多少生石灰？
B: We should order at least five tons to ensure we have enough.
B：我们应该至少订购五吨，以确保供应充足。
1) 生石灰
2) 氧化钙
1. 生石灰
noun
1. a white, caustic substance produced by heating limestone