The canoe is made from an impermeable wood.
该独木舟用防水木材制成。
The impermeable layer has aged, we must find someone to repair it.
渗层已经老化，要请人来修理了。
Thin layers of other impermeable materials are found in nature, too.
在自然界中也发现有其他非渗透性薄层物质。
It is observed that the crack impermeable model can be used under some condition.
结果表明，裂缝不可渗透的边界模型在一定条件下可以合理使用。
It is observed that the crack impermeable model can be used under some condition.
结果表明，裂缝不可渗透的边界模型在一定条件下可以合理使用。
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