什么是 inactive?Not active or tending to be active.Not functioning or operating; out of use: inactive machinery. Not being in continuous use or operation: an inactive brokerage account. Retired from duty or service.Chemistry Not readily participating in chemical reactions; inert.Biology Marked by the absence or reduction of activity, such as the ability to cause infection.Medicine Quiescent. Used especially of a disease.Physics Showing no optical activity in polarized light.