交替: to replace, alternately, in turn...
惊动: to alarm, to startle, to disturb...
无缘: to have no opportunity, no way (of doing sth), no chance, no connection, not placed (in a competition), (in pop lyrics) no chance of love, no place to be together etc...
穷: poor, destitute, to use up, to exhaust, thoroughly, extremely, (coll.) persistently and pointlessly...