频繁使用这把剪刀剪硬纸板会使其很快变钝。

Using these scissors to cut cardboard frequently ___blunts them quickly.

听音乐可以缓解工作的压力。

Listening to music ___blunts the stress from work.

他偷偷在公园里抽了几根大麻烟。

He secretly smoked a few ___blunts in the park.