下列英语句子中的部分是否可用it代替?
下列英语句子中的部分是否可用it代替?
句子“If ΔAk1 ≥ 0,then f(t) at the sampling instant of f(N+1) is in a steady state;if ΔAk1 < 0,then f(t) at the sampling instant of f(N+1) is in a varying state.”
是否可以用it代替为:“If ΔAk1 ≥ 0,then f(t) at the sampling instant of f(N+1) is in a steady state;if ΔAk1 < 0,then it is in a varying state.