The first and most important addition was accessprotection for methods and instance variables on classes -- the public, protected, and private keywords.
Vacuum distillation using the dropper with the exhaust port and the accessprotection tube to prevent leakage of liquid directly into the vacuum pump.
减压蒸馏使用带抽气口和防护滴管的接液管，可以防止液体直接泄露到真空泵中。
3
Programs running inside the SPU need to be rather simplistic and self-contained, so you don't need complicated accessprotection or different privilege modes in the SPU itself.