Houston, here's the tricky part.
The solar is the only tricky part.
Creating a valid solid to export from is the tricky part.
But knowing what is a clue that's the tricky part.
The only slightly tricky part of this is generating the id that gravatar expects.
Le seul point délicat est la génération de l'id que gravatar attend.
Getting back in is the tricky part.
Y revenir c'est la partie difficile.
So this is going to be the tricky part.
Ainsi ça va être la partie difficile.
That's the tricky part right there.
Tu en es à la partie difficile.
Now, this is the tricky part.
Maintenant, c'est la partie difficile.
Now the tricky part of the story.
Maintenant vient la partie délicate de l'histoire.
For statistics, there is the tricky part of the standards differences.
Pour les statistiques, il y a la partie délicate des différences de normes.
But that last one percent, as it always seems to be, is the tricky part.
Mais ce dernier pourcent, comme toujours, est la partie délicate.
This is a tricky part of the path.
C'est une partie délicate du périple.