到了他不得不走的地步。It got to the point where he had to leave.我不得不暂缓就业打算，呆在家里。I had to postpone ideas of a career and stay at home.你不得不承认，你事实上是陷入了困境。You have to admit that you are, in fact, in difficulties....
The zero point of the density scale is defined by having no specimen in the densitometer.定义密度计内设有样品时的密度为密度尺标的零点.Once again, illustrators exposure sites in order to achieve the optical density at least version 4.00.再不主, 不...