He is good at solving problems of trigonometric functions.

He drew a pentagon on the blackboard.

The magnification of this microscope is 100 times.

The range of functions has expanded due to the expansion of this software.

The cell nucleus holds genetic information.

It is reported that North Korea has conducted another underground nuclear test.

What is the market price of this house?

Nuclear tests pose a great threat to world peace.

Establishing a new company requires time and effort.

He had a conviction in his own correctness.