Free-electron theory of metals
[电] 金属的自由电子理论
🧩 词语组成解析
free
[fri]
adj. 自由的;免费的;免税的;空闲的;
adv. 免费地;自由地，无拘束地;一帆风顺地;
vt. 免除;释放;使自由;解救;
electron
[i'lektrɔn]
n. 电子;
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];
五金
🗣️ 情景例句
But there's the old community center on Elm Street.
但是在Elm街有一个旧的社区中心。
Would you please tell us the price of these electric heaters so as to help us make the decision.
能否告知这些电热器的价格，以便我们作出决定。
They will arrive in half an hour.
他们将于半小时之内到达。