重点讲解：
1. keep up with 跟上（变化等）；
We are having trouble keeping up with the recent surge in demand.
对于近来出现的需求猛增，我们难以应对4+mo-!Z+A,)_ma_WzN。
2. distinguish between 区分；辨别；分清；
At what age are children able to distinguish between right and wrong?
儿童到什么年龄才能明辨是非？
3. wrestle with 试图解决；绞尽脑汁处理；
Delegates wrestled with the problems of violence and sanctions.
代表们试图解决暴力与惩处的问题Il+YPLQ8kr02u3nT|6z[。
4. pass on to 将…转移给；将…转嫁给；
Moreover, the convention in the industry was to pass on to consumers any rise in costs.
此外，按照行业惯例，一旦生产成本上涨，它们就会转嫁给消费者xZyU)qxp+v(fpN^。