He made various efforts to solve the problem.

Success is the result of continuation.

He is a friend as precious as gold and jade.

On Christmas, my mother makes a special kugel for us.

Kulak was a Russian peasant.

My favorite subject is mathematics.

The Beiyang Army played an important role in modern Chinese history.

The continuation of this company is largely due to the efforts of its employees.

This lotion is a quasi drug.

He is good at trapeze performances.