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

He decided to challenge the exploration of the Dark Continent.

Could you attend the meeting on my behalf?

Do you need a plastic bag?

He tried to change the past by time traveling.

He tried to change history by using a time leap to go back to the past.

He was half dead from fatigue.

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

He has a habit of always boasting.

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