A skew-symmetric matrix has the characteristic that its transpose matrix is the inverse of the original matrix.

The signal from the cell phone relay-station in this area is weak.

I create a balance sheet every month to understand my financial situation.

The Taiwan Strait is the strait that separates China and Taiwan.

He decided to challenge the exploration of the Dark Continent.

He always boasts, but in reality, he does nothing.

He has a habit of always boasting.

The Grand Duchy of Luxembourg is a small country in Europe.

The launch of intercontinental ballistic missiles has become an international issue.

He is preparing to explore the Dark Continent.