她的话中有一丝真实的成分。

There's ___an ___element ___of truth in what she says.

我认为我如此喜欢马赛的原因是因为它为我的生活带来了一丝不安和危险。

I think the reason why I loved Marseille so much was because it brought ___an ___element ___of insecurity and danger into my life.

他的道歉中有一丝真诚。

His apology had ___an ___element ___of sincerity.