懂的英文：
to understand
to know

参考例句：
  • He knows thieves' cant.
    他懂盗贼的黑话。
  • --'Ah, I understand,' said the lieutenant; 'and you seek admittance into our ranks?'
    ‘啊，我懂啦，’副首领说道，‘你要求加入我们的一伙是吗？
  • OK?
    懂了吗?
  • Half a tale is enough for a wise man
    智者一听就懂
  • Teachers are supposed to know a lot.
    老师理应懂得多。
  • A Hindu clerk who is literate in English.
    懂英语的印度职员
  • Have a smattering of French,German,etc
    懂一点法语、德语等.
  • Dull and useless
    蒙懂无用
  • to sleep like a top;To sleep like a log
    睡得蒙懂
  • I know something about mechanics.
    我懂一点力学。

understand是什么意思：
v. 懂，理解；了解，认识到；体谅
  • If you were older you might understand.
    假如你年龄再大一点，你就会理解了。
  • I understand that skepticism.
    我明白这一怀疑论。
  • You have to understand how cells interact.
    你必须明白细胞是怎样相互作用的。

know是什么意思：
v. 知道，了解，懂得；认识，熟悉；认出；体验；见到过，听到过
  • Learn not and know not
    不学无术
  • Know/not know what is most important and act accordingly
    能[不能]按轻重缓急行事
  • Do you know that lady?
    你认识那位夫人吗？

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