Sineu is the connective tissue that is connecting the muscle fibers.

这些纹路是连接肌肉纤维的结缔组织。

Ribs, brisket, pork shoulder, all cuts of meat that have tons of connective tissue, the molecular glue that supports all those muscle fibers.

肋骨，牛腩，猪肩肉，所有的肉块都有大量的结缔组织，支撑所有这些肌肉纤维的分子胶。

Every time you pump a weight at the gym, your muscles experience damage, but the body recovers by forming new muscle protein strands to repair the muscle fibers.

每次你在健身房举重的时候，你的肌肉都会受损。但是身体通过形成新的肌肉蛋白链来修复肌肉纤维。

At the large scale, this hamstring stretch is pulling on layers of protective tissue surrounding the muscle fibers, as well as the tendons that connect this muscle to nearby bones.

在大范围内， 这种腿筋拉伸会拉动肌肉纤维周围的保护组织层，以及将这块肌肉连接到附近骨骼的肌腱。