Translations for practice in French

Here are paragraphs from public domain books translated:

I tried to put in practice the theories of Prudence, and to be as gay as my two companions; but what was natural in them was on my part an effort, and the nervous laughter, whose source they did not detect, was nearer to tears than to mirth.	J'essayai de mettre en pratique les théories de Prudence et d'être aussi gai que mes deux compagnes; mais ce qui chez elles était nature, chez moi était effort, et le rire nerveux que j'avais, et auquel elles se trompèrent, touchait de bien près aux larmes.
The Lady with the Camellias, by Alexandre Dumas son	La Dame aux Camélias, de Alexandre Dumas fils

This contest at length exhausted Jussac's patience. Furious at being held in check by one whom he had considered a boy, he became warm and began to make mistakes. D'Artagnan, who though wanting in practice had a sound theory, redoubled his agility. Jussac, anxious to put an end to this, springing forward, aimed a terrible thrust at his adversary, but the latter parried it; and while Jussac was recovering himself, glided like a serpent beneath his blade, and passed his sword through his body. Jussac fell like a dead mass.

Enfin cette lutte finit par faire perdre patience à Jussac. Furieux d’être tenu en échec par celui qu’il regardait comme un enfant, il s’échauffa et commença à faire des fautes. D’Artagnan, qui, à défaut de la pratique, avait une profonde théorie, redoubla d’agilité. Jussac, voulant en finir, porta un coup terrible à son adversaire en se fendant à fond ; mais celui-ci para prime, et tandis que Jussac se relevait, se glissant comme un serpent sous son fer, il lui passa son épée au travers du corps. Jussac tomba comme une masse.

The Three Musketeers, by Alexandre Dumas

Les Trois Mousquetaires, de Alexandre Dumas