siphon off的用法和樣例：
例句
- If you're short of petrol you can siphon off a gallon from my tank.
如果汽油不夠，你可以從我的油箱中用虹吸管吸一加侖去。 - Open the cover of the machine after the machin stops to discharge the cake from the top manually or siphon it out of the machine.
固相物截留在轉鼓內，分離完畢，停機后啟開機蓋，由人工從上部卸料或虹吸管吸出機外。
