By the middle of the 19th century, the Beijing dialect had become dominant and was essential for any business with the imperial court.

Professional development for teachers is considered essential with opportunities and funding provided.

He added that the support of expanding the base was essential to good relations with America.

The lubrication was necessary, essential with the size of him.

But if a second head injury occurs in the game, immediate removal from play is essential, with no return until after a careful medical evaluation.

This is even more essential with respect to products developed and provided by joint ventures such as Visa.

Such research is particularly essential with maternity clothes, analysts say, because a woman's body changes weekly.

A thorough investigation of the crimes is essential, with those responsible being brought to justice.

For economic growth, independence and freedom of action are essential with more, not less, national flexibility.

This is essential, especially with a contingent of Romulans in the room.