运动员需要强化防御技能。

Yùndòng yuán xūyào qiáng huà fángyù jìnéng.

Athletes need to strengthen their defensive skills.

这个城市建有坚固的城墙来防御敌人。

Zhège chéngshì jiànyǒu jiāngù de chéngqiáng lái fángyù dírén.

This city has a strong city wall to defend against enemies.

守门员的防御能力关乎整场比赛的胜负。

Shǒuményuán de fángyù nénglì guānhū zhěngchǎng bǐsài de shèngfù.

The goalkeeper's defensive ability is crucial to the outcome of the entire game.