Aerocasing
氰化钙液体氰化法, 钙盐氰化
🗣️ 情景例句
I must prepare my lessons.
我必须准备工课。
A barking dog is better than a sleeping lion.
吠犬胜于睡狮。
If you have any comment about these clauses, do not hesitate to make.
对这些条款有何意见，请尽管提，不必客气。