Selenium tetrafluoride
[化] 四氟化硒
🧩 词语组成解析
selenium
[[si'li:njəm]]
n. 硒\\n[化] 硒Se
n. [化]四氟化物
🗣️ 情景例句
I have no problem with that.
对这一点我没有异议。
What is happening out there?
外面发生什么事情？
and so the tools of long ago have remained when even the bones of the men who made them have disappeared without trace.
因此，尽管制造这些工具的人的骨头早已荡然无存，但远古时代的石头工具却保存了下来。