Responding to email and being in a meeting are indubitably forms of work.

回复邮件和开会毫无疑问都是工作的一种形。

First, it proved indubitably that she and her husband occupied separate rooms, in itself a shocking enough state of affairs.

一，它毋庸置疑地证实她跟丈夫是分睡的，这本身就是骇人听闻的了。

On the other hand, lead was easy to extract and work, and almost embarrassingly profitable to produce industrially, and tetraethyl lead did indubitably stop engines from knocking.

一方面，铅很容易提炼和开采，大规模生产极其有利可图，四乙铅确实可以防止发动机爆震。