untight

The thin sand bed is composed of tight mixed type cementation facies and untight mixed type cementation facies.

其中,薄砂层由致密混合型胶结相和非致密混合型胶结相组成;

The causes why rural credit cooperatives are in the predicament are various, but to rural credit cooperative themselves, untight internal control is an important reason.

导致农村信用社经营处困境的因素是多方面的,但就信用社自身来说,内控制不严是一个重要的原因。