Step 3: Use a pencil to make a hole into both sides of the tube.(第三步：用铅笔在试管的两边都戳一个洞。)
I work in the extruded tube business.(我在挤压管行业工作。)
Heat the glass tube to the point that it can bend.(将玻璃管加热到能弯曲的程度。)
The tube of the tube worm is really, really long.(管虫的管非常非常长。)
We know they smear a liquid on the tube, but we don't know where they secrete it from or what its chemical composition is.(我们知道它们在管上涂抹了一种液体，但我们不知道它们从哪里分泌出这种液体，也不知道它的化学成分是什么。)
The only baseball he saw was on the tube.(他只在电视上看过棒球比赛。)
The only components required, are six feet of plastic tube, and a container to catch the water.(唯一需要的组件是6英尺长的塑料管和一个接水的容器。)
They inserted a tube in his mouth to help him breathe.(他们在他嘴里插了根导管帮助他呼吸。)
Wind blows through the tube and makes it fly and dance around.(风吹过管子，使它飞起来，四处飞舞。)
After supper, we'd sprawl on Mom's bed and stare for hours at the tube.(晚饭后，我们趴在妈妈的床上，看了好几个小时电视。)
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