政府投资于国防建设。

Zhèngfǔ tóuzī yú guófáng jiànshè.

The government invests in national defense construction.

军人负责国防安全。

Jūnrén fùzé guófáng ānquán.

Soldiers are responsible for national defense.

我们需要强大的国防。

Wǒmen xūyào qiángdà de guófáng.

We need a strong national defense.