But how sad, he also thought, that on that dashing locomotive there was no mess, no lives colliding and no good subjects for him; that Chinese people should once again look so orderly, reserved and indifferent to each other, even on a train. 是陈述语序的感叹句结构,省略了 it was,it 是形式主语,that...为真实主语。 = But he also thought how sad it was that...