And he began to laugh again, and that so heartily, that though I did not see the joke as he did, I was again obliged to join him in his mirth.

• 说到这里，他又开怀大笑起来，弄得我虽然并不像他那样觉得这件事有什么可笑之处，也身不由己地跟着他笑了起来。