经过我们研究，发现有的耳塞能完全密封住耳槽。
Some of the research we did studied earphones that completely seal up the ear canal.
然后我也小心地密封住了自己的心情。
这是因为通过练习，你的嘴唇会紧紧地密封住吹孔，这样气流就不会在嘴唇边漏掉了。
This is because, with practice, your lips form a better seal around the holes, so that air does not escape.
空气在向下运动过程中受到浮标向上的推力，使阀球将阀门里的气舱密封住，这样迫使气流进入雾笛。
Air is forced up from the buoy counterweight tube during downward motion causing the balls to seal the air ports in the valve, thus forcing the air to flow into the whistle.
在我们的例子中，通常在紧急情况防井喷器能够密封住井喷。由于一系列的缺点和错误，妨碍该设备的正常运作，因此它没能密封住。
A series of flaws and errors got in the way of the normal operation of the device, and so it did not seal the well.
在我们的例子中，通常在紧急情况防井喷器能够密封住井喷。由于一系列的缺点和错误，妨碍该设备的正常运作，因此它没能密封住。
A series of flaws and errors got in the way of the normal operation of the device, and so it did not seal the well.
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