我们需要加强防御以保护自己。
wǒmen xūyào jiāqiáng fángyù yǐ bǎohù zìjǐ 。
We need to strengthen our defense to protect ourselves.
国防是国家安全的重要部分。
guófáng shì guójiāānquán de zhòngyào bùfèn 。
National defense is an important part of national security.
在比赛中，防御同样重要。
zài bǐsài zhōng ， fángyù tóngyàng zhòngyào 。
Defense is equally important in a match.