Evacuation of vacuum tube
[电] 真空管的抽空法
🧩 词语组成解析
evacuation
[iˌvækju'eiʃən]
n. 撤空;撤离;撤退;疏散;
of
[əv]
prep. 关于;属于…的;由…制成;
aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气];
🗣️ 情景例句
Money can't buy happiness, believe me.
金钱买不到幸福，相信我。
I work hard all morning.
我整个早上努力工作。
Sally was very excited because she had never travelled on a train before.
萨莉非常激动，因为她从未乘过火车。