Scientists explain all of these manifestations of the arrow of time in terms of entropy—loosely, the “disorderliness” of a system.
就约束力小的一致性而言，科学家把所有这些时间的箭头的表现解释为一个系统的“无序”。
2
The apparent arrow of time emerges as a property of the macroscopic system, but it's not there in the laws that govern the individual particle interactions.
很显然时间箭头成为了宏观系统的一种性质，但没有定律来控制单个原子间的相互作用。
3
The removal of a neutron from the system is indicated by the head of an arrow.