The double takes assumed a certain subtlety.
John Thwaites, born in the dale in 1917, was very much aware of certain subtleties.
There are also issues which, while soluble, require a certain subtlety of approach.
But as a gesture, withdrawing the security escort lacks a certain subtlety.
But most 18-year-old boys aren't sufficiently developed, lack crucial skills or don't understand certain subtleties of the game.
In hearings about one's personal conflicts of conscience, certain subtleties may arise.
The astronomer had made his point, if not directly, then at least with a certain grave subtlety.
These varied not only by certain subtleties of dress but by interest.
At any rate, this experience has a certain subtlety that does not speak of ill intent from outside sources.
Still, there was a certain subtlety of expression that Earth models lacked.