tubing

• The end of the connecting tube is sealed with a flame .
  连接管的末端用火焰密封。
• It is a stainless steel tube about 2cm in diameter .
  它是直径约2厘米的不锈钢管。
• There is a green residue in the bottom of the test tube .
  试管底部有绿色的沉淀。
• Epithelium also lines the air tubes and lung cavities .
  上皮组织还衬盖气管和肺腔。
• An appropriate-size tube is chosen to fit the trachea .
  选用与气管大小相仿的管子。
• The test tube is closed at one end with a hydraulic seal .
  试管的一端为水封所封闭。
• I think you are down the tube .
  我想你确实陷进去了。
• A serologic reaction retards the growth of the pollen tube .
  血清反应阻止花粉管生长。
• It is connected to a string which passes through a tube .
  它与一根通过管子的绳子相连。
• The connector is used to link the throat and stomach tubes .
  连接器用来连接咽喉和胃管。