Steganogram
密码
🗣️ 情景例句
Come on, darlings.
来， 亲爱的。
It is a matter of life and death to me.
那对我是生死交关的问题。
the necessary method of study is to group the relevant material and to take note of all possible variant forms and conditions.
应采取的研究方法是，把有关各方面的材料汇集起来，同时注意任何可能出现的异常情况和条件。