Nentode
五极管(电子管)
🗣️ 情景例句
That's great.
真棒！
What''s the cause of the delay?
什么原因延误？
Forest fires are often caused by broken glass or by cigarette ends which people carelessly throw away.
森林火灾时常由破碎的玻璃或人们随手扔掉的香烟头引起。