“It might be invisible ink! ” she whispered.

“也许是隐形墨水！”她小声说。

Michael took some invisible ink and he spread it all over the bedspread, squirted it all over.

迈克尔竟然拿神奇墨水洒得一床都是。

But they're written in some kind of invisible ink.

原来还有秘密是用隐形墨水写的。

Sometimes messages had to be written in invisible ink and signed withsecret code names.

有时，信息必须用隐形墨水书写， 并用秘密代号签名。

And you put lemon juice on the invisible ink --this is a true story --and you disappear.

你把柠檬汁倒在隐形墨水上——这是一个真实的故事——然后你就消失了。

The ring also used invisible ink to write their  messages, writing these hidden messages between the lines of innocuous letters or on the  back of pamphlets and other documents.

该团伙还使用隐形墨水来书写信息，将这些隐藏信息写在无害字母的行间或小册子和其他文件的背面。