例句與造句

1. Thus, while the sum of the rest masses of the particles is not conserved in radioactive decay, the " system " mass and system invariant mass ( and also the system total energy ) is conserved throughout any decay process.
2. On the other hand, for systems which are unbound, the " closure " of the system may be enforced by an idealized surface, inasmuch as no mass-energy can be allowed into or out of the test-volume over time, if conservation of system invariant mass is to hold during that time.
3. It's difficult to find system invariants in a sentence. 用system invariants造句挺難的