The Pentagon is to begin funding covert operations by opposition groups.五角大楼开始资助反对派团体的秘密行动。

They have been supplying covert military aid to the rebels.他们一直在暗中向叛军提供军事援助。

The depth of covert racism in my own profession frightens me.在我从事的职业中深藏着的种族主义令我恐惧。