trentaine

Il a la trentaine.

He's in his thirties.

Tu entres dans la trentaine.

You're turning thirty.

Elle a dit qu'elle avait la trentaine.

She said she was over thirty.

Tom et Marie ont tous deux la trentaine.

Tom and Mary are both in their thirties.

Tom semblait avoir la trentaine.

Tom appeared to be in his early thirties.

Tom devait avoir la trentaine quand il a fait ça.

Tom was probably about thirteen when he did that.

Il est au début de la trentaine.

He is in his early thirties.

Il a dit qu'il avait la trentaine.

He said he was over thirty.

Le bruit étrange n'a duré qu'une trentaine de secondes.

The strange noise only lasted for about thirty seconds.

En gros, il devait y avoir une trentaine de personnes dans le bus.

Roughly speaking, there were about 30 people in the bus.

Une trentaine d'insurgés ont été tués.

About thirty insurgents were killed.

Une trentaine de personnes furent blessées.

About thirty people were injured.