Silicomagnesiofluorite
氟硅钙镁石
🗣️ 情景例句
Are you carrying any items that need to be declared?
你没有携带需要申报的东西吗？
Have you invited any boys?
你邀请男孩吗？
The degree of secrecy naturally varies considerably.
保密程度自然差别很大。