I happen to hear the news.

我恰巧听说了这个消息。

Those who happen to hear it may suffer.

那些谁碰巧听到它可能受到影响。

If you happen to hear a humming sound and see a flash of color whiz by... who knows?

假如你偶然听到嗡嗡的声音并看见一道缤纷色彩色彩掠过…谁知道呢？

If they happen to hear any sound that is not quite familiar to them, they need to check it out very soon.

如果碰巧听到什么声音，那是不太熟悉他们，他们需要看看很快。

Those who happen to hear it may suffer. But the guy who’s enjoying himself in the misty bathroom can’t control himself.

浴室歌声无法发行，偶然听到的人也许耳朵要受罪，可是那个在水雾中温暖松弛的家伙，他无法控制自己啊。