Flings should also be I is flung .

甩也应该是我被甩。

His flings never lasted long enough to remember their names .

他从来不甩持续足够长的时间记住他们的名字。

The other side of the coin is that summer flings may turn into serious long-term relationships .

硬币的另一面是，夏季调情可能会变成认真的长期关系。

E.g. you have yourself a few flings this summer .

这个夏天你会有几回艳遇。

He flings himself to the job with great enthusiasm .

他以很大的热情投入这项工作。