弹回，跳回：弹回，如因开火而弹回。
每天都会有事把你推得丧失平衡(而大多数时间这个“事情”会得逞)，但每次你都能反弹回来找到平衡。
Every day something will try to push you out of balance (and most of the time this "something" will succeed) but every time you will be able to bounce back to your balance.
当激光从纤维上弹回后，反射的光会随着电子信号的改变而改变。
When laser light is bounced off the fibre, the reflected light is modulated in accordance with the electrical signals.
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