1. The influence of fly-ash on the imperviousness of concrete is discussed in the paper through the experiments on fly-ash concretes samples.

2. I tried to erect a facade of imperviousness and self - confidence .

3. And two people can indulge in imperviousness as well as in anything else.

4. One of the reasons Beavis and Butt-head are likable, after all, is their imperviousness to the outside world.

5. He gave the appearance of a leathery skin, thick neck, imperviousness to any delicacy.

6. One consequence was the Chinese determination "to prove their imperviousness to outside pressure.

7. Fouda, who conducted the interview at an Al Qaeda safe housein Karachi, said that he was astounded not only by Mohammed's boasting but alsoby his seeming imperviousness to the danger of being caught.

8. High density polyethylene (HDPE) film have many advantages, such as high-strength, imperviousness, corrosion resistance, age resistance, convenient to construct, and so on.

8. try its best to gather and create good sentences.

9. An influence of flyash on the compressive strength and imperviousness of concrete is discussed in the paper through the experiments on flyash concrete samples.

10. Analysis for groution effect and dam observation results show that grouting effect and imperviousness of curtain are satisfactory.

11. What is abnormal and unexpected is the extraordinary toughness of the tie and its imperviousness to conscious correction.

12. The measurement of actual works also explained that the use of compound geotextile in rock fill dam surface can reduce the amount of leakage water by 60%, the effects of imperviousness are obvious.