You have to mix oil into the gas in a two-stroke engine because the holes in the cylinder wall prevent the use of rings to seal the combustion chamber.
在二冲程发动机中你必须混和燃料和气体，因为气缸壁上的孔阻止使用活塞环密封燃烧室。
2
Mix all oils together and pour mixture into a storage jar made of glass with an airtight seal.
全部浇油混合在一起，混合成储藏罐不透气的密封玻璃制成。
3
Bees collect propolis, mix it with their own enzymes and beeswax, and use it to seal the hive.