Translation of "heavily" into Korean

However, there was one thing that had been weighing heavily upon my heart.

그러나 마음을 무겁게 짓누르는 것이 하나 있었다.

But, again, the station and the train are both heavily guarded.

그러나 기차역과 기차는 둘다 보안이 아주심하다네.