invisible ink

常见例句

the relevant part of the statement must be written in invisible ink.
聲明中相關部分必須用隱形墨水書寫。
An identity borrowed from a dead Canadian, forged passports, messages sent by shortwave burst transmission or in invisible ink.
使用借來的已經去世的加拿大人身份証件，他們偽造護照，利用短波脈沖發射設備傳遞信息或者是用隱形墨水書寫重要情報。
The American delegation is claiming that it "sends a clear message" and "increases North Korea's isolation"; the relevant part of the statement must be written in invisible ink.
美國代表宣稱它“傳遞了一條明示”而且“加劇了朝鮮的孤立”；聲明中相關部分必須用隱形墨水書寫。

But the stock was bid for as if the disclosures had been written in invisible ink.
FORBES: Magazine Article