To tune up, the guitarist tightens an adjustor screw at the bridge that alters the position of its corresponding spring, changing its leverage to obtain the right tension.
调音时，吉他手旋紧琴桥上的调整螺旋来修正所对应弹簧的位置，以此改变杠杆角度获得正确的张力。
2
Your sunglasses will get misted and their metal rim will freeze the bridge of your nose but bright sunshine and white snow will make you screw your eyes.
太阳眼睛会被附上薄雾，以及金属边框会把你的鼻梁冻伤，但刺眼的阳光和白雪会灼伤你的眼睛。
3
The formulation and technology of the special material of extruding PA66 profile bar produced for cold bridge by twin-screw extruder were introduced.