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汇:排泄。象是连水也流不出去。形容拥挤或包围的非常严密。
[be so jammed as to be impassable;be watertight that not even a drop of water could trickle through] 形容十分拥挤或围得非常严密 板棚里挤得水泄不通。——《筑路》