Barylite
硅钡铍石
🗣️ 情景例句
It's an excellent title.
这是个绝妙的书名。
Is this your book?
这是你的书吗？
It must have been a gas that could burn but that would not explode, a gas that did not smell strong, and a gas that did not kill people.
它一定是一种能够燃烧而不能爆炸的气体，一种味道不很强的而且不使人致死的气体。