Pressing Oil from Seeds
用種子榨油
Oil is separated from seeds by using pressure.
把油從種子里擠壓出來,需要借助一定的外力。
A machine called a press is often used.
在此過程中,通常會用到一種叫做壓榨機的機器。
The first step in pressing the oil from seeds is to crush the seeds between two stones.
榨油的第一步是把種子放在兩塊石頭之間進行擠壓,
A cloth container or bag is filled with the crushed seeds.
然后將擠壓后的種子裝在布袋或布制的容器里,
Then the bag is hung up.
接著把布袋懸掛起來,
Some of the oil will flow out of the bag and can be collected.
油便從布袋中流出,可以將這些油收集起來。
But some oil will remain in the crushed seeds inside the bag.
但是一些油仍然留在布袋里那些擠壓過的種子中。
The easiest way to get the rest of the oil out is to place heavy rocks on the crushed material.
將這些剩下的油弄出來的最簡單的方式是用重石頭壓那些擠壓過的種子。
Another method is to place several cloth bags on top of each other in a box.
另一個方法是將幾個布袋層層疊起來放在箱子里,
Then a long wooden stick is used to slowly push a heavy cover down on the bags.
然后用一根長長的木棍緩慢推動沉重的覆蓋物以擠壓這些布袋。
Great pressure is produced in this way.
用這種方式可以產生巨大的壓力。
Much greater pressure can be produced by using a machine.
我們還可以借助機械產生更大的壓力。
The greater the pressure, the more oil will be produced.
壓力越大,榨出的油就越多。