第17章

This course is compulsory for all first-year students.

Compute the average cost per unit

He concealed his actual intentions from his comrades

I concede that your argument is logical and coherent

It is hard to conceive of a world without computers.

Concentrate on the task at hand and ignore the noise

This issue concerns all members of the community

He concluded his speech with a brief summary.

We need concrete evidence, not abstract notions.

We condemn all acts of brutal violence