ostensibly

The meeting was ostensibly about the budget, but it quickly turned into a discussion about staff morale.

(Chinese) 会议表面上是关于预算的，但很快就变成了关于员工士气的讨论。

He went to the library ostensibly to study, though he spent most of his time texting friends.

(Chinese) 他去图书馆表面上是去学习，尽管他大部分时间都在给朋友发信息。