Be cautious of
公共 Public留心..., 谨防...
🧩 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;
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
I haven't seen you for a long time.
很久没见了。
Hungry belies have no ears.
饥寒起盗心。
Half an hour? That's too long! Is there a bus?
半小时？那太久了！有公共汽车吗？