我参加了一个全国性的竞赛。
wǒ cānjiā le yígè quánguó xìngde jìngsài 。
I participated in a national competition.
这是一场非常激烈的竞赛。
zhè shì yī cháng fēicháng jīliè de jìngsài 。
This is a very intense competition.
他的目标是赢得这次竞赛的冠军。
tāde mùbiāo shì yíngde zhècì jìngsài de guànjūn 。
His goal is to win the championship of this competition.