The merger talks were conducted in complete secrecy until the official announcement on Monday.

合併談判在週一正式宣布前一直完全秘密進行。

All staff must sign an agreement promising secrecy about the new product design.

所有員工都必須簽署協議，承諾對新產品設計保密。

The hotel guaranteed the celebrity guests total secrecy, using a private entrance and elevator.

飯店保證名人房客完全隱密，安排專屬入口和電梯。