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n.[解剖]四头肌
1、quadriceps femoris───股四头肌
1、Without lifting your heel up in the air, tighten your quadriceps muscle as hard as you can for ten seconds.───向上举起你的脚后跟，绷紧你的四头肌肌肉坚持10秒。
2、And then he took out a third of my quadriceps muscle.───最后他切除了我三分之一的四头肌。
3、an MRI revealed that I'd torn 90 percent of my right quadriceps, I was flown back to Washington.───磁共振成像显示，我90%的右侧四头肌撕裂，于是我被飞机送回华盛顿。
4、Steps work wonders for lifting and tightening the gluteal muscles, quadriceps, calves, and hamstrings.───台阶有助于提升和收紧臀肌、股四头肌，以及腿筋。
5、The front leg quadriceps contract to support the body weight.───前腿股四头肌收缩，支撑身体重量。
6、The quadriceps muscles along the front of the thigh firmly contract to straighten the knees.───股四头肌处于大腿前侧，有力收缩使膝盖伸直。
7、The quadriceps muscle brings your knee into full extension.───四头肌肌肉让你的膝进入完全的延长。
8、After your knee has stretched out for a while, perform a set of ten quadriceps contractions with your leg in the same position.───在你的膝已经伸展出一阵子之后，在相同的位置做10次股四头肌收缩。
9、The front and back leg quadriceps contract, extending the knees and stretching the lower region of the hamstrings.───股四头肌前侧和后侧收缩，伸直膝盖、伸展腘旁肌下部。