A covert study revealed the secrets of the organization.

一项秘密研究揭示了这个组织的秘密。

A covert investigation was launched to arrest drug smuggling groups.

为缉获毒品走私集团，一次秘密调查就此展开。

The rabbit ran into the covert and eluded the hunter.

这只兔子跑进了树林，躲过了猎人的抓捕。

The government was accused of covert military operations against the regime.

该政府被指责秘密组织推翻这一政权的军事行动

He stole a covert glance at her across the table.

他隔着桌子偷偷地瞥了她一眼。

They have been supplying covert military aid to the rebels.

他们一直在为叛军提供隐秘的军事援助。

Then he made his deliberations covert.

然后，他进行不公开的审议。

Mark Covert doesn't have to think about his run today.

马克·卡维特不需要考虑今天需不需要去跑步。

Covert cross-border trade also helped alleviate some misery.

秘密的边境贸易也帮助减少了一些不幸。