1.
So tightly made that water cannot enter or escape.
水密的制造之紧密以致水无法进入或漏出的
2.
Mercury has a much greater density than water.
水银的密度比水大得多。
3.
a watertight compartment, joint, seal
水密室、 水密接合、水密封.
4.
Specific gravity is the ratio of the density of a substance to the density of water.
比重是某物质的密度与水的密度之比。
5.
All sponge rubber packing for watertight doors need to be renewed.
所有水密门的多孔橡皮密封垫换新。
6.
of such close construction as to be impermeable.
结构紧密以至不透水的。
7.
salinity, temperature, and density of sea water
海水的盐度、温度和密度
8.
Ice is not so dense as water and therefore it floats.
冰的密度小于水，因此能浮在水面上。
9.
Study on the Benefits of the Water-reserving Forest in the Upper Reaches of Miyun Reservoir
密云水库上游水源涵养林效益的研究
10.
Survey on the Water Environment of Intensive Eel Culturing
水泥池高密度养殖鳗鲡水环境的调查
11.
Preoxidation and Enhanced Coagulation for the Water from the Miyun Reservoir;
密云水库水的预氧化及强化混凝研究
12.
Synthesis of new water expandable waterproofing sealant and its application
新型水膨胀防水密封胶的合成与应用
13.
In that case， special stuffing tube will be used to keep the watertightness.
那样的话，需要安装专用的密封过管来确保水密。
14.
Waterproofing and sealing of shield tail and sealing grease
盾构法隧道的盾尾防水密封与盾尾密封油脂
15.
Study on Affection of Water Resources Protection Forest to Water Quality of Miyun Reservoir in Beijing, China;
北京密云水库水源涵养林对水质的影响研究
16.
Influence of Side Chain Density of Polycarboxylate Superplasticizer on Hydration of Cement
聚羧酸减水剂支链密度对水泥水化行为的影响
17.
Comparation on the water conservation capacity of water resources protection forests in Miyun reservoir watershed
密云水库主要水源保护林的水源涵养能力比较
18.
As the surface freezes, the ice floats because it is less dense than water.
当湖面冻结时，冰由于密度小于水的密度而浮在水面。