在付出了所有艰苦努力后，失去工作真是当面一记耳光。

After all that hard work, losing my job was ___a ___slap ___in ___the ___face.

看到那些孩子的痛苦就像一记耳光。

Seeing the children's suffering was ___a ___slap ___in ___the ___face.

他公开批评我的工作感觉就像一记耳光。

His public criticism of my work felt like ___a ___slap ___in ___the ___face.