The consequences will be very grave if nothing is done.

　　如果不采取任何措施后果將會是非常嚴重的。

　　The country's economy is now in grave peril.

　　現在，這個國家的經濟陷入了嚴重危機。

　　Is there life beyond the grave?

　　人死后有來生嗎？

　　These words are carved on the stone beside his grave.

　　在他的墓碑上刻著這樣的話。

　　He was looking correctly grave.

　　他表情嚴肅得體。