他的笑声很有感染力。
tāde xiàoshēng hěnyǒu gǎnrǎnlì 。
His laugh is very infectious.
我们在公园里听到孩子们的笑声。
wǒmen zài gōngyuán lǐ tīngdào háizǐ mén de xiàoshēng 。
We heard the children's laughter in the park.
在派对上，笑声不断。
zài pàiduì shàng ， xiàoshēng bùduàn 。
At the party, laughter was continuous.