VB中if cnn is Nothing句中这个is Nothing是什么意思

VB中if cnn is Nothing句中这个is Nothing是什么意思 vb 中 IF C >=A 在VB中command1.caption=nothing是什么意思? if you study hard,nothing is difficlt. If there is nothing,you had to go home 中主语是什么 Nothing is difficult in the world ,if you put your heart into it.Nothing is impossible . 在VB中 什么意思?例如：if intext then nothing is difficult if you try your best to do I think nothing is i_____ if you work hard. Nothing is difficult if you put your heart into it. nothing is difficult if you put your heart into it. Nothing is difficult if you put your heart into it!. nothing is difficult if you work hard是什么意思 翻译Nothing is impossible if it's possible. 翻译he is nothing if not a scoundrel nothing is difficult if you put your h*** into it If you have a dream impossible is nothing! Nothing is imposseble if you take yuo heart in it!