例句與造句

1. South Africa observed a national mourning period of 10 days . During this time numerous memorial services were conducted across the country.
2. The order from President Kim Dae-jung marked the first time South Korea has decided to observe a national mourning day for another country, Park said.
3. It's difficult to find observe a national mourning in a sentence. 用observe a national mourning造句挺難的