There is a small bit of asymmetry here: packing multiple values always creates a tuple, and unpacking works for any sequence.
这里有一点不对称：封装多重参数通常会创建一个元组，而拆封操作可以作用于任何序列。
2
Connection sequence of the grain size screening device, the density screening device and the color selection device is variable, however, the packing device is connected at last.
所述的粒径筛选装置、密度筛选装置、色选装置的连接顺序不定，但最后连接的是包装装置。
3
From the goods according to the packing list, usually take out of sequence, recorded by the goods should be ticket stockpiling.