keep it very secret (指消息、心事等);airtight;stuffy;badly ventilated ;

He lofts it into the air, and hugs his head in the deep secret embrace.
他抬手甩了出去, 然后赶忙把头紧紧的抱了个密不透风.
来源:词典精选例句As we look at it from here it appears to be an impenetrable green wall.
由这里望去,它象是一堵密不透风的绿墙.
来源:词典精选例句He surrounded himself with an impermeable wall of secretaries, personal assistants and yes-men.
他把自己用由秘书 、 私人助理和 唯唯诺诺 的人组成的密不透风的墙包围起来.
来源:互联网摘选Airtight in its city streets did not leave any corner of the opportunity to air permeability.
密不透风的城市街道不曾在它的任何角落留下透气的机会.
来源:互联网摘选
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