1.be defined by 以……为标志性特征

If the 20th century was defined by the American Dream, what can China bring to the world in the 21st century?

如果二十世纪是美国梦的世纪，那中国能给21世纪带来些什么呢？

2.all but one 除了一个剩下的都……

All but one of the plates were damaged.

除了有一个，剩下的盘子全打碎了1&iLK(LvN3。

3.put in place 落实到位

With more effective measures put in place, the disease has been brought under control.

由于采取了更有效的措施，疾病已经得到了控制qxr)fA_rvOGwT^。

4..sound like a broken record 啰嗦

At the risk of sounding like a broken record, let me repeat: it will be difficult to do well in the exam without attending classes regularly.

就算冒着被你们觉得啰嗦的风险，我也还是要重申一遍，经常缺课的话考试就会很难通过wGC|LC#%5uTQ。