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重點講解：
1. filter out 濾除；濾掉；
Children should have glasses which filter out UV rays.
兒童應該戴上濾除紫外線的眼鏡。
2. suffer from (因疾病或處于其他不利境地而)受苦，受難，受折磨；
They suffer from health problems and fear the long term effects of radiation
他們遭受著健康問題的困擾并且害怕輻射的長期影響。
3. wipe out 摧毀；毀滅；使滅絕；
Of course, in the event of a disaster big enough to wipe out all humans, such as a colossal asteroid strike, it would not really matter.
當然，萬一遭到一次足以毀滅全人類的災難，例如行星撞地球，這個問題將會無關緊要。
4. be sure of 一定的；必定的；無疑的；確保的；
One thing I am sure of was that she was scared.
有一點我能肯定，那就是她當時被嚇到了。
