Was heißt »tüchtig« auf Englisch?

Das Adjektiv »tüchtig« lässt sich wie folgt von Deutsch auf Englisch übersetzen:

Deutsch/Englische Beispielübersetzungen

Er ist ein tüchtiger Schüler. Er lernt drei Stunden am Tag.: He is a diligent student. He studies three hours every day.
Sie ist immer tüchtig.: She always works hard.
Bitte langt tüchtig zu! Es gibt genug Kartoffelsalat für alle.: Please help yourselves. There's enough potato salad for everyone.
Du bist sehr tüchtig.: You're very efficient.
Je zufriedener ein Arbeiter, desto tüchtiger ist er.: A happy worker is a better worker.
Ich habe letzten Monat tüchtig gearbeitet.: I worked hard last month.
Er ist immer tüchtig.: He always works hard.
Tom hat tüchtig zugenommen.: Tom has put on a lot of weight.
Der Specht hämmert tüchtig auf den Baumstamm ein.: The woodpecker is pecking the tree trunk vigorously.
Tom ist nicht sehr tüchtig.: Tom isn't very efficient.

It's a very brave step.
I need twenty efficient workers.
Tom put up a brave fight.
Pompey is such a brave soldier that his friends call him "The Great".
You have to be brave to be an actor. It's not easy to perform on stage in front of a lot of people. I am too shy for that.
Mary is the more diligent of the two pupils.
There must be a more efficient way to do this.
How beauteous mankind is! O brave new world, That has such people in't!
Offshore units are more efficient because wind speeds tend to be faster and steadier than on land, and even small increases in speed yield large increases in energy production.
He is brave.
She's brave.
She is brave.
The soldiers were brave.
The bicycle is the most elegant and efficient means of transport ever invented.
He's very brave.
He's brave.
Ungratefulness is always some kind of weakness. I have never seen diligent people who were ungrateful.
She is a brave girl.
This house is energy efficient.
He's strong as a bull and brave as a lion.