v.知道;了解;认识;确信;
例句:
His secret died with him, and now we shall never know the truth.
他的秘密随他一起离去, 现在我们永远也不可能知道真相了.
Do you know the responsibilities of the government workers?
你知道政府工作人员的职责 吗 ?
We must know how to judge people.
我们必须善于识别人.