closed so tightly as to be airtight or watertight.
关闭的很紧的，不透气的或不透水的。
of such close construction as to be impermeable.
结构紧密以至不透水的。
hearting concrete
不透水的心墙混凝土
A waterproof or water-resistant coat.
雨衣不透水的或抗水的外衣
It could not pass through material impervious to water such as mica.
它不能通过云母这样的不透水的物质。
`The valves are not sufficiently charged!'
它们底部不透水的密封水舱的容积也不够大。
a material impervious to water; steel impervious to bullets; someone impervious to argument.
不透水的物质；子弹不能穿透钢铁；有人不接受批评。
the act of treating something to make it repel water.
是某物不透水的处理过程。
Impervious to or unaffected by water.
防水的不透水或不为水所影响的
A duck's back sheds water.
鸭子的背部不透水。
The external layer of the skin is relatively impermeable to water.
皮肤的外层不透水。
Resistant to penetration by water but not entirely waterproof.
抗水的能抵抗水的渗透但不完全防水的
impermeable barrier
不可渗透层;不渗水层;不渗透遮挡层;不透层;不透水隔层
water-tight case
不透水外壳, 耐水外壳
a work executed with opaque watercolors mixed with gum.
用不透明的水彩混合橡胶作的画。
The pervious or impervious boundary conditions are just special cases in this paper.
通常所研究的透水或不透水边界条件只是本文的特例。
But rainwater cannot penetrate their cottages.
不过雨水无法渗透过他们的茅草房。
an opaque watercolor prepared with gum.
用橡胶调制出来的一种不透明水彩。