dark horse

n.

黑马（出人意外得胜的马）；

复数：dark horses

Dark Horse
Dark horse
Dark Horse
Zinc: the brain's dark horse.
Thirty years of baculovirus-insect cell protein expression: from dark horse to mainstream technology
Pharmacology. The puzzling rise and fall of a dark-horse Alzheimer's drug.
Dietary sodium: the dark horse amongst cardiovascular and renal risk factors
Vitamin E: a dark horse at the crossroad of cancer management
Hitch-hiking parasite: a dark horse may be the real rider
The invariant NKT cell subset in anti-viral defenses: a dark horse in anti-influenza immunity?
IGFBP-2: The dark horse in metabolism and cancer.
The Dark Horse of Evaluating Long-Term Field Performance—Data Filtering
1995 Gaston Labat Lecture. Ropivacaine. White knight or dark horse?