On guard
其它 Other在岗, 警惕
📝 例句
Be on guard against those who are jealous of your success.
要提防那些嫉妒你的成功的人。
He is most free from danger, who even when safe, is on guard.
居安思危，最为保险。
We must be on guard not to let the enemy spies worm in.
我们必须警惕,不让敌特钻进来。
The man below there are always on guard.
下面的人又总是片刻不离地守着。
And right off I was on guard against Mencken's books.
我马上就对门肯的书警觉起来了。
🧩 词语组成解析
on
[ɑn]
prep. （表示方向）向;（表示对象）对;（表示位置）在…上;（表示时间）在…之时;
adv. （放，穿，连接）上;向前，（继续）下去;
adj. 活动着的情况，状态;使用着的;发生着的;计划中的;
guard
[ɡɑrd]
n. 警卫;狱吏，看守;护卫队;防护装置;
vt. 保卫，守护;看守;加防护装置;谨慎使用;
vi. 警惕;警卫;
🗣️ 情景例句
It seems I owe you an apology.
好像我该向你道个歉。
When love puts in, friendship is gone.
爱情入，友谊出。
I'm not sure. I ought to do some studying, as I've got masses of work to do, but I think I'll be too tired. Maybe I'll just watch the news on television and go to bed early.
还不清楚。我有大量的作业要做，按理我应该学习，但是我想这样一来我会很累的。我可能会看看电视新闻，然后早点上床睡觉。