他那富有感染力的笑声打破了沉寂。

Hiss laughter, which was infectious, broke the silence.

youdao

或许以后我会越来越成熟，越来越远离单纯，可是我希望能一辈子保持自己富有感染力的笑声、活泼的个性以及快乐的本性。

I may get more and more mature, further and further away from innocence in future, but I hope I can always keep my contagious laughter, bubbly personality and my happy nature for my whole life.

youdao

笑声，像许多其它内啡肽触发器一样，能帮助减少一定程度的应激激素，而且还可能就有感染力，增强你的免疫系统，而不是削弱它。

Laughter, like so many other endorphin-triggers, helps to reduce certain stress hormones and, while it might be contagious, it strengthens your immune system rather than weakening it.

youdao

笑声，像许多其它内啡肽触发器一样，能帮助减少一定程度的应激激素，而且还可能就有感染力，增强你的免疫系统，而不是削弱它。

Laughter, like so many other endorphin-triggers, helps to reduce certain stress hormones and, while it might be contagious, it strengthens your immune system rather than weakening it.

youdao