sevens

n.

七年之痒，（因对配偶生厌而）想找个新的性伴侶( seven的名词复数 )；

seven years七年

at sixes and sevens乱七八糟

seven seas世界七大洋

group of seven七国集团；七大工业国

seven deadly sins七宗罪，七大罪

seven sages n. （对统治和立法有贡献的）古代希腊七贤人

seven sisters七姊妹（世界七大石油公司）；北斗星团

The serial sevens subtraction test.
Incidence of injury in amateur rugby league sevens
Effects of rugby sevens matches on human neutrophil-related non-specific immunity
Running demands and heart rate responses in men Rugby Sevens.
At sixes and sevens: characterization of the symmetry mismatch of the ClpAP chaperone-assisted protease.
Movement patterns in rugby sevens: effects of tournament level, fatigue and substitute players
Physiological, anthropometric, and performance characteristics of rugby sevens players
Positional differences in match running performance and physical collisions in men rugby sevens
Caffeine-containing energy drink improves sprint performance during an international rugby sevens competition
Contribution of postprandial glucose to chronic hyperglycaemia: from the "glucose triad"to the trilogy of "sevens".