Lysenko gave a deep rumbling laugh at his own joke.
李森科对自己讲的笑话报以朗声大笑。
I just couldn't laugh at his jokes the way I used to.
我就是不能像以前那样笑他讲的笑话。
When I was a lad his age I would laugh at the strangest things.
我是他那么大的`小伙子时，我常嘲笑一些最奇怪的事情。
Frank tried to laugh off his aunt's worry.
弗兰克试图对他姑妈的烦恼一笑置之。