重点讲解：
1. be responsible for 负有责任的；应承担责任的；
The sun's ultraviolet rays are responsible for both tanning and burning.
阳光中的紫外线是皮肤晒黑和灼伤的根源8)i~RjDGL%-。
2. find out (尤指特意通过努力)发现，找出，查明；
They had their tablets analysed to find out whether they were getting the real drug or not.
他们将药片拿去化验以查明他们得到的是否是真药!iLJ0w@e*o=5fHr2MN。
3. break up 散（会）；（使）解散；
Police used tear gas to break up a demonstration.
警察使用催泪瓦斯驱散示威人群TDsAaL-QdYK。
4. return to 恢复，回到(原来的状态)；
Bank of England officials continued to insist that the pound would soon return to stability but disaster struck.
英格兰银行官员仍然坚持说英镑不久就会恢复稳定，但结果灾难爆发了G@F6_]*8Zc3%sKbtdYD*。

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