Although I moistened it, the flap doesn't stick to the envelope.是什么意思？

Although I moistened it, the flap doesn't stick to the envelope.

我把信封弄湿了, 可是信封口盖还是粘不上.

although

conj. 尽管，虽然，但是，然

例句
He was in love with her, although he did not put that name to it.
他爱着她，虽然他没有将其称为爱。

moistened

v. （使）变得潮湿，变得湿润( moisten的过去式和过去分词 )；

例句
...a moistened flannel.
沾湿的毛巾

it

pron. 它，他，正好是所需的，事实[情况]；n. <美俚>傻瓜，笨蛋，<俚>绝妙的人，理想的东西，登峰造极；

例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

flap

n. 扁平物，[航] 襟翼，拍打，拍打声，〈口〉不安，恐

例句
They would flap bath towels from their balconies as they chatted.
他们聊天时会在阳台上抖搂浴巾。

stick

vt.& vi. 粘贴，张贴，插入，刺入；vt. 容忍，产生作用，（尤指迅速或随手）放置，阻延或推迟；n. 棍棒，棍枝，枝条，操纵杆，球棍；

例句
The dog came bounding back with the stick for Richard to throw again.
那只狗蹦跳着叼回了木棍，交给理查德让他再扔出去。

to

prep. 向，朝着，到，关于，属于；adv. 朝一个方向的，到某种状态，关闭；

例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

envelope

n. 信封，封皮，壳层，外壳，包裹物，[生物学]膜，包袋；

例句
After completing and signing it, please return the form to us in the envelope provided.
填完表格并签名后，请装进所提供的信封里寄还给我们。