Be certain of
公共 Public确信
🧩 词语组成解析
be
[bi]
v. 是;有，存在;做，成为;发生;
aux. 用来表示某人或某物即主语本身，用来表示某人或某物属于某一群体或有某种性质;
certain
['sə:tən]
adj. 某一;必然的;已确定的;
pron. [动词用复数]某些;
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
Nobody. That's the problem.
没有人。这就是问题所在。
Oh, really? Where did you go?
哦，真好？去哪儿了？
Firemen had been fighting the forest for nearly three weeks before they could get it under control.
消防队员们同那场森林大火搏斗了将近3个星期才最后把火势控制住。