The waves reverberate as far away as the end of the building.声波反射的很远,一直传到建筑物的那一头.The news sent shock waves through the community that have continued to reverberate to this day.这则消息震惊了整个社区，直到现在还波澜未息。The controversy surrou...
The memory expansion cards are useful adjuncts to the computer.内存扩充卡是计算机很有用的附件。the expansion and contraction of the metal金属的膨胀与收缩a period of rapid economic expansion经济迅猛发展期...