Exactly. Besides, packaging has to be convenient and safe in delivery, that is the principle of circulation.
完全正确。除此之外，包装还必须满足运输时的方便、安全原则。这就是流通原则。
2
It was less than two years after the principle of solid circulation was confirmed in the large-scale pilot plant.
这距固体循环的原理在大型中间试验装置中得到确认之后不到两年。
3
Marx insists that when capital employs labor in the "realm of circulation" (Liutong Lingyu), both sides follow a principle of exchange on the basis of equivalence in value.