As he approached the Chancellor it was noticed that his lips were trembling slightly in his otherwise impassive face.
Christopher Hibbert DISRAELI: A Personal History (2004)
The judge leaned forward and gave me a piercing look, his wig trembling slightly.
James Fergusson KANDAHAR COCKNEY: A Tale of Two Worlds (2004)
The eggs are done when they are just set but will still tremble slightly in the ramekins.
Times, Sunday Times (2006)