She is clearly the most articulate and self-possessed member of her family.

显然，她是全家口才最好、最沉着冷静的人。

We've found him ourselves, miles from home, and quite self-possessed and cheerful!

我们自己就找到过他，离家好几英里，他很镇定，也很高兴！

She always seemed so poised, so self-possessed.

而她看上去总是那样神情自若而又怡然。

The baronet was pale, but calm and self-possessed.

从男爵面色苍白，但镇静而沉着。

The single person might just be too self-possessed.

单身的人或许过于淡然。