救援人员因风浪太大而被迫中断工作。The rescuers were beaten back by strong winds and currents.马克被迫承担大部分工作。Mark was condemned to do most of the work.乐队被迫取消了一系列的现场表演。The band was forced to cancel a string of live dates....
Radium can be used to treat cancer.镭可以用来治疗癌症.Radon is the daughter of radium.氡是镭的子体.Radium can be fixed some distance from its original source.镭在离它的原始母体一定距离上固定下来....