最好把所有的磨光玻璃接头都装上聚四氟乙稀套管，以防止它们粘在一起。
It is advisable to fit all the ground glass joints with polytetrafluroethylene sleeves to prevent their sticking together .
我站在珠宝店柜台前仔细欣赏着闪光夺目的珠宝以及明亮的磨光玻璃柜里独具匠心的宝石镶座。
I stood at the jewelry counter carefully scrutinizing the glittering stones and creative Settings in the brilliantly polished glass case.
用细钢丝绒或玻璃纸把它磨光。
用细钢丝绒或玻璃纸把它磨光。
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