1. 我译：一人独得话语之机妙而会心一笑，余众皆因丝毫无察而视为聒噪。
The laughter that affirms an idea we do not feel seems mere noise.
2. 我译：一人独得话语之机妙而会心一笑，余众皆因丝毫无察而视为聒噪。
The laughter that affirms an idea we do not feel seems merenoise.
3. 余众的近义词
3. 若那笑声不绝如缕，却又无法使余众为之所动，便觉刺耳了。
And constant repitition of that particular noise, when it is not infectious, is grating.